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Case Study: Leaking Cast Iron Wastewater Pipe Repair at a London Hotel

Pipe repair carried out to a wastewater pipe made of cast iron in a central London hotel

Getting a room – Sylmasta solve the problem of a leaking cast iron wastewater pipe in an iconic London hotel

An iconic central London hotel faced having to shut one of its most prestigious rooms after a cast iron wastewater pipe located in the ceiling above developed a large circular crack which initially proved impossible to repair.

Case Study Data


Site
Hotel
Location
London, United Kingdom
Repair Type
No pressure pipe repair
Defect
50 x 25mm hole in a cast iron wastewater pipe

Products Used


Superfast Steel Epoxy Putty Stick
Superfast Steel was formed into a disc shape and used to seal the crack

SylWrap HD Pipe Repair Bandage
The Superfast Steel was overwrapped with a SylWrap HD Bandage, reinforcing the initial seal

SylWrap Standard Pipe Repair Kit
Superfast Steel and SylWrap HD can be purchased together as part of the Standard Pipe Repair Kit

Case Study PDF


Case Study Review


Several attempts had been made to repair the leaking cast iron wastewater pipe, but its location within the hotel made it particularly troublesome. The pipe was crammed into a gap between the floor of one level and the ceiling of another, leaving virtually no room to work.

The hotel’s initial repair attempt had seen them try and wrap the pipe with a repair bandage. Although the crack was successfully covered, it was not successfully sealed and so began leaking again once pressure was turned back on.

A cracked cast iron wastewater pipe repair which had failed at a hotel in the United Kingdom
The failed first repair of the pipe
A 50 x 25mm crack in a cast iron wastewater pipe which required repair
The 50 x 25mm crack was located on an elbow joint

The 50 x 25mm hole therefore required an alternative repair method. To complicate the repair further, the crack in the cast iron wastewater pipe was on an elbow joint.

Sylmasta decided that the most effective pipe repair product to seal the hole would be Superfast Steel Epoxy Repair Stick. The size and the position of the crack still possessed some challenges, which were eventually overcome by some out-of-the-box thinking by the Sylmasta technicians.

The Superfast Steel Stick was hand kneaded as normal, but rather than being pushed immediately into the crack it was instead formed into a disc larger than the hole in order to completely cover it. This disc of epoxy putty was then attached to a strip of polythene sheeting.

Steel epoxy putty used to seal a crack in a leaking cast iron wastewater pipe
Superfast Steel formed into a disc and applied over the crack

The sheeting would support the epoxy putty whilst it was stretched over the crack in the pipe. Once in position, the edges of the disc were pushed tightly down onto the cast iron pipe to form a good seal with the surface of the pipe.

Once the epoxy putty was in place, the whole repair was overwrapped with a SylWrap HD Pipe Repair Bandage. SylWrap is water activated and sets rock-hard to provide an impact resistant layer over the initial repair. It does not need to be stretched for an effective application, meaning that it could easily be applied to the cast iron pipe despite the space constraints.

A SylWrap Pipe Repair Bandage applied over a cracked cast iron wastewater pipe in a London hotel
The Superfast Steel was overwrapped with a SylWrap HD Pipe Repair Bandage

After the repair was completed, the hotel was able to reopen to the public the popular room which had been affected by the leaking wastewater pipe. The solution is permanent and was carried out at a fraction of the cost of hiring a plumber or replacing the damaged pipe.

It also saved time with the repair being effective in less than an hour. Sylmasta have since recommended that the hotel take stock of the SylWrap Pipe Repair Contractor Case, a kit which contains enough products to carry out up to six pipe repairs.

A Contractor Case can be easily stored on site, enabling an emergency pipe repair to be carried out as soon a pipe related problem arises for the hotel in the future. All the products included in the Contractor Case are WRAS approved, making them safe to use with drinking water.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

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Case Study: Repair of a Cracked PVC Pipe in a Swimming Pool Filtration System

Repair of a plastic PVC pipe which formed part of a swimming pool filtration system in a leisure centre

The swimming pool filtration system repair which helped to keep a Welsh leisure centre’s head above water

When a section of plastic PVC pipe which formed part of the swimming pool filtration system in a Welsh leisure centre developed a 50mm crack, a repair looked impossible until Sylmasta swam to the rescue.

Case Study Data


Site
Leisure Centre Swimming Pool
Location
South Wales, United Kingdom
Repair Type
Live leak pipe repair
Defect
50mm crack in a 200mm PVC plastic pipe

Products Used


Wrap & Seal Pipe Burst Tape
Wrap & Seal was applied around the damaged area of pipe to seal the live leak

SylWrap HD Pipe Repair Bandage
Used to provide an impact-resistant layer over the Wrap & Seal Pipe Burst Tape

SylWrap Universal Pipe Repair Kit
Both items were supplied to the Leisure Centre in the SylWrap Universal Pipe Repair Kit for live leak repairs

Case Study PDF


Case Study Review


The section of pipework in question had for many years been resting on a steel bracket. Over time, this had caused the PVC to weaken and sag, which ultimately is what led to the crack developing.

What made the leak so challenging was the location of the pipe. It was only 76mm above the ground and surrounded by other components of the swimming pool filtration system, making access for a repair extremely difficult.

Once that problem had been overcome, the next challenge as the crack itself was at the bottom of the pipe, facing towards the ground. This severely restricted the type of pipe repair that could be carried out, not to mention that if the pressure was turned off, the person carrying out the repair from above could no longer tell exactly where the crack was without the guidance of water gushing from the hole.

A crack in a PVC plastic pipe in a swimming pool filtration system at a leisure centre in the United Kingdom
The 50mm crack in the PVC plastic pipe had to be repaired as a live leak

The maintenance company responsible for the leisure centre would normally have two repair methods for a leaking pipe in a swimming pool filtration system. The first would be to remove the damaged section and plastic weld it. If the damage was too severe, they would simply replace the pipework.

To remove this particular section of pipe however would have required the disassembly of half the filtration system. It would have been a time-consuming and costly exercise which would have required the closure of the swimming pool to complete.

What the maintenance company needed was a product which could carry out a permanent, live leak repair within a confined space. After seeking technical assistance from Sylmasta, we were able to supply a Universal Pipe Repair Kit to fix the leaking PVC plastic pipe.

Wrap & Seal Waterproof Pipe Repair Tape used to seal a crack in a PVC plastic pipe in a swimming pool filtration system
Despite the lack of space around the pipe, the user was able to successfully apply Wrap & Seal to seal the leak

Because water pressure needed to be maintained during the repair, Wrap & Seal Pipe Burst Tape was used to seal the leak. It is normally recommended that Wrap & Seal be stretched to the maximum of 300% of its length to provide a tight seal around the leak area, where it will fuse into a solid rubber band capable of withstanding pressure up to 30bar.

With just 76mm to play with between the pipe and the ground, the maximum stretch was unachievable. Not that this mattered as the pipe repair tape was still more than capable of repairing the leak. It was then overwrapped with a SylWrap HD Pipe Repair Bandage, which set rock hard in 30 minutes for a permanent solution.

A SylWrap HD Pipe Repair Bandage used to fix a leaking swimming pool filtration pipe made of PVC plastic
The repair was completed using a SylWrap HD Pipe Repair Bandage

The impact resistant layer provided by the Bandage ensured that the steel bracket would cause no further damage to the PVC plastic pipe. To strengthen and protect the pipe from future wear and tear, it was decided to wrap the entire length in further bandages.

So impressed were the maintenance company with the speed and ease of the repair that they have subsequently recommended that leisure centres and swimming pool servicing companies take stock of SylWrap Pipe Repair Kits for any future emergencies.

The group technical manager said: “Leaks often occur at times when spares are challenging to obtain, such as evenings and weekends, so I suggested they consider stocking SylWrap products as a solution for fixing a leaking pipe quickly as soon as it is reported.”

These companies have since benefited from taking stock of the SylWrap Pipe Repair Contractor Case. Each case contains enough products to carry out up to six repairs at a cheaper cost-per-repair than when buying individual Universal Pipe Repair Kits. They are easy to store either on site or on the van, providing an on-hand solution for whenever emergencies arise.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

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Case Study: Pinhole Repair of a Steel Pipe in a Furniture Factory Sprinkler System

The repair of a leaking pipe in a sprinkler system at a British furniture company's workshop carried out using a SylWrap Standard Pipe Repair Kit

Sylmasta’s sprinkler pipe repair saves a furniture company from burning money on an entire system replacement

After a sprinkler maintenance company informed a furniture company that the only solution to a pinhole leak on a tee in their factory’s sprinkler system was to replace the entire length of steel pipe, the furniture company instead sought out Sylmasta to provide a cost-effective and convenient repair.

Case Study Data


Site
Furniture Factory
Location
Southern England, United Kingdom
Repair Type
No pressure pipe repair
Defect
Pinhole leak on a steel pipe tee

Products Used


Superfast Steel Epoxy Putty Stick
Superfast Steel was used to plug the pinhole leak in the steel pipe

SylWrap HD Pipe Repair Bandage
SylWrap HD Pipe Repair Bandage was wrapped around the tee junction to reinforce the repair

SylWrap Standard Pipe Repair Kit
The repair was carried out using a Standard Pipe Repair Kit which contains both items for no pressure repairs

Case Study PDF


Case Study Review


The furniture company needed a quick repair for a number of reasons. There were two safety elements to consider; the first being the very obvious dangers that come with a faulty sprinkler system and the second that the leaking pipe was located high up in the roof of the warehouse, next to the incoming electricity supply.

Any water which passed through the leaking section was therefore in danger of coming into contact with the electrics. There was also the danger that water escaping from the pinhole would cause damage to the furniture being stored and manufactured below.

A steel pipe in a furniture factory's sprinkler system located in the roof developed a pinhole leak
The location of the tee junction high in the roof of the factory made fixing the pinhole leak challenging

Initially, the furniture company contacted their sprinkler maintenance company. After inspecting the problem, the maintenance company decided to try and repair the leak with a pipe repair clamp. This proved impossible however due to the pinhole being directly below a tee junction in the steel pipe.

After this failed attempt, the sprinkler maintenance company advised that the only solution would be to replace the entire length of steel pipe, at great cost to the furniture company and forcing the closure of the factory whilst the work was undertaken.

A pinhole leak on a steel pipe tee junction prior to being repaired using Superfast Steel Epoxy Putty
The pinhole leak marked on the steel pipe

Understandably, this was a road that the furniture company did not wish to go down, and so they decided to seek out alternative repair methods, leading them to Sylmasta. Because the pressure was turned off in the damaged section of the sprinkler system, Sylmasta were able to recommend a SylWrap Standard Pipe Repair Kit for the repair.

The furniture factory reached the damaged section of pipework using a tower. Once up in the rafters, a Superfast Steel Epoxy Putty Stick was mixed by hand and used to plug the pinhole leak. The Putty hardened within 5-10 minutes, after which it was overwrapped with a SylWrap HD Pipe Repair Bandage.

Repair of a pinhole leak in a steel pipe completed using a SylWrap Pipe Repair Bandage
The repair was completed using a SylWrap HD Pipe Repair Bandage

The bandage was applied over the pinhole leak and around both sections of the tee junction to provide maximum coverage and pressure resistance. One of the furniture factory’s concerns was that the pressure in the sprinkler system can be as high as 8 bar and they needed a repair method that could withstand such levels.

This was no problem for the Standard Pipe Repair Kit. The cured Superfast Steel and SylWrap Bandage are suitable for repairs up to 30 bar. Within an hour of the repair being completed, the system was put back into use at a fraction of the cost of the replacement recommended by the sprinkler maintenance company.

Following the repair, the furniture company’s maintenance manager got in touch to say: “I found the repair putty and the bandage very easy to use and will no doubt be using Sylmasta products again.”

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

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Case Study: Underground Heating Pipe with Insulation Lagging Repair on a Farm

Repair of a leaking hot water pipe on a farm carried out using a SylWrap Universal Pipe Repair Kit

The heating pipe with insulation lagging repair which will keep a farm’s hot water on until the cows come home

A farm in the United Kingdom was undergoing building work when contractors accidentally drilled through an underground heating pipe with insulation lagging supplying the farmhouse’s hot water, which subsequently required a rapid repair to keep the hot water on

Case Study Data


Site
Farm
Location
United Kingdom
Repair Type
Live leak pipe repair
Defect
Pinhole leak in an insulation lagged pipe

Products Used


SylWrap Universal Pipe Repair Kit
The contractor was supplied with a Universal Pipe Repair Kit to carry out the repair

Wrap & Seal Pipe Burst Tape
The high temperature resistance of Wrap & Seal made it ideal for repairing a heating pipe carrying hot water

SylWrap HD Pipe Repair Bandage
SylWrap HD provided an added layer of protection to the pipe from the continuing building works

Case Study PDF


Case Study Review


The contractors were working on a paved yard between two buildings when they came across what they believed to be a disused drainage pipe. It was only once they cut into the pipe using a hole saw that they realised it actually contained two pipes with a layer of insulation lagging which supplied hot water from an outbuilding to the main building on the farm.

After an initial inspection, it looked like replacing the pipe would be both extremely difficult and very expensive. The pipe would have to be dug out from the ground, and the outer pipe and a huge amount of insulation lagging cut away just to access the heating pipe which was leaking.

A leaking pinhole in an underground heating pipe on a United Kingdom farm which required a live leak repair
The hole on the inner pipe caused when the contractors accidentally drilled through

To carry out a replacement, the farmhouse’s hot water supply would have to be shut off, leaving the occupants to go without any hot water or heat. In an industry such as agriculture, that would have been a nightmare.

Instead of this complex, time-consuming and inconvenient replacement, the contractors turned to a SylWrap Universal Pipe Repair Kit to fix the problem in a fraction of the time and for minimal cost. The Universal Kit allows repairs to take place on live leaks, which also meant that water pressure did not need to be turned off.

Wrap & Seal Pipe Burst Tape used to repair a live leak on an underground heating pipe
The outer pipe and lagging were cut away from the inner pipe before Wrap & Seal was applied
Wrap & Seal Pipe Repair Tape successfully used to seal the leak

The contractors began the repair by removing a minimal amount of lagging. Once they could access the heating pipe, Wrap & Seal Pipe Burst Tape was wrapped around the pipe, fusing into a solid rubber bound to seal the live leak. With pressure resistance up to 30 bar and temperature resistance to 200°C, Wrap & Seal was more than suitable for a repair involving a hot water installation.

A SylWrap HD Pipe Repair Bandage was then wrapped over the initial repair to provide an impact resistant layer to the Wrap & Seal. This protective covering was vital in this application to reinforce the initial repair against any further complications during the building works.

SylWrap HD Pipe Repair Bandage used to add another layer of protection to an underground heating pipe on a farm in the United Kingdom
SylWrap HD Pipe Repair Bandage offered a further layer of protection to the pipe

Both Wrap & Seal and SylWrap HD Pipe Repair Bandage have WRAS approval, meaning that they are safe to use with water which might be consumed by humans. This was another important consideration for the repair, given that the pipe supplied a domestic property.

The entire repair was completed in less than an hour, a significant reduction on the amount of time it would have taken had the contractors needed to dig out the pipe to replace it. The speed and ease of the repair ensured that there was minimal disruption to the hot water supply in the farmhouse and saved the contractor the expense that would have been incurred by a having to replace the pipe.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: contact@sylmasta.com

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Case Study: High Temperature Live Leak Pipe Repair in an on-site CHP Plant

A CHP System Repair carried out on a leaking pipe in a pant at an automotive safety supplier in the United Kingdom

Saving the planet, one Plant at a time – the pipe repair which kept a carbon-reducing CHP Plant running

A leaking pipe in the CHP Plant of an automotive safety supplier’s factory could have caused serious issues to the site’s power supply and energy efficiency until Sylmasta provided a high temperature repair method

Case Study Data


Site
Automotive Safety Supplier Factory
Location
West Midlands, United Kingdom
Repair Type
Live leak pipe repair
Defect
Leaking elbow in a high temperature pipe

Products Used


SylWrap Universal Pipe Repair Kit
A Universal Pipe Repair Kit was sent to the factory for the repair

Wrap & Seal Pipe Burst Tape
Wrap & Seal provided the required temperature resistance and versatility to seal a leaking elbow joint

SylWrap HD Pipe Repair Bandage
The entire repair was overwrapped with SylWrap HD for an impact resistant layer of protection

Case Study PDF


Case Study Review


Combined Heat and Power (CHP) Plants are used to increase energy efficiency and drive down costs at industrial sites. CHP captures the heat produced when electricity is generated that would otherwise be wasted, using it to provide thermal energy such as steam or hot water. This can then be used for the heating or cooling of sites, producing domestic hot water, or industrial processes.

Typically, a CHP Plant can reduce a site’s energy bills by 20% and carbon emissions by 30% – as long as the system is in good working order. When the systems in a CHP Plant develop a fault or are not managed correctly, then these savings are lost.

Depending on how reliant the site is on the heat supplied by CHP, faults can also be extremely disruptive – especially if the Plant has to be taken completely out of service to have parts replaced.

It looked like this was a problem that an automotive safety supplier in the United Kingdom was going to face when a pipe in their factory’s CHP Plant began leaking. Although it was not a major leak, water was dripping onto other components in the CHP system, including motors and gas tanks which were stored underneath the damaged pipe.

A leaking high temperature pipe in an on-site CHP Plant at an automotive safety company's factory
The leak area of the pipe made carrying out a repair extremely challenging

There were three issues which made the repair challenging. The first was that the leak was on an elbow joint, making it difficult to form a tight seal around the damaged area in order to repair it.

The second was that CHP systems deal with extreme temperatures. The pipe requiring repair operated in excess of 120°C, so a solution that was effective in high temperature applications was required.

The third was that the automotive safety supplier could only take the CHP Plant out of service as a last resort. This meant that a live leak repair needed to be carried out to avoid considerable disruption.

After contacting Sylmasta to discuss whether a successful live leak repair on a high temperature elbow joint was possible, a SylWrap Universal Pipe Repair Kit was delivered to the site, enabling the staff at the factory to complete the repair themselves.

Wrap & Seal Waterproof Repair Tape used to seal a leaking high temperature elbow join on a pipe in a CHP Plant
Wrap & Seal provided a temperature resistant and versatile repair to the elbow

Wrap & Seal Pipe Burst Tape was applied around the leaking elbow joint. The waterproof repair tape was stretched to the maximum 300% of its length and wrapped around the pipe, where it fused into a silicone band to seal the leak.

The initial repair was then overwrapped with a SylWrap HD Pipe Repair Bandage, which is water-activated and sets rock-hard in minutes to form a protective layer, ensuring a permanent repair to the pipe.

A SylWrap HD Pipe Repair Bandage applied to a high temperature elbow joint which was leaking
SylWrap HD completed the repair. The red tinge comes from the extreme temperature of the pipe

Both Wrap & Seal and SylWrap HD Pipe Repair Bandage are resistant up to 200°C, making them suitable for use on high temperature pipework such as those in a CHP Plant. The Bandage did cure with a red tinge because of the temperature extremes. Should the automotive safety supplier want the repair to appear more uniform with the rest of the pipe in the future, then SylWrap HD can be painted.

After the CHP Plant repair had been completed, the automotive safety supplier got in contact with Sylmasta to say that they were extremely impressed with the ease and speed which with which they had been able to carry out the repair.

Repair made to a high temperature pipe in a CHP Plant at an automotive safety supplier's factory in the United Kingdom
The completed repair allowed the CHP Plant to resume operations without having to undergo a shutdown

For dealing with future leaks, not just in their CHP Plant but across the whole site, Sylmasta recommended that the company take stock of a SylWrap Pipe Repair Contractor Case. The Case contains enough products to make up to six pipe repairs. Keeping one on-site would enable the automotive safety supplier to quickly repair leaking pipes as soon as problems arise.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

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Case Study: Repair of a Cracked Contaminated Water Pipe in a Puerto Rico Power Station

A contaminated water pipe repair carried out in a Power Plant in Puerto Rico using Sylmasta products

Riding the storm – how a Sylmasta contaminated water pipe repair helped keep power going in Puerto Rico during Hurricane Maria

In 2015, a contaminated water pipe in a Puerto Rican Power Station began leaking, leaving the Power Authority in charge of the plant with two options – find a way to carry out a repair which did not require taking the pipe out of service or shutdown the generator it was connected to. Little did they know what an important decision they were taking.

Case Study Data


Site
Power Station
Location
Puerto Rico
Repair Type
Live leak pipe repair
Defect
Cracked steel contaminated water pipe

Products Used


Wrap & Seal Pipe Burst Tape
Wrap & Seal fused over the crack to provide a high pressure, temperature resistant, solid rubber band, sealing the leak

SylWrap HD Pipe Repair Bandage
The taped crack was overwrapped with SylWrap HD, reinforcing the initial repair with an impact resistant layer

SylWrap Universal Pipe Repair Kit
The products were provided as part of a Universal Pipe Repair Kit for live leaks

Case Study PDF


Case Study Review


The Puerto Rico Power Authority contacted Sylmasta to ascertain if a live leak repair to the cracked steel pipe would be possible. The SylWrap Universal Pipe Repair Kit was recommended and so the contaminated water pipe was easily repaired.

Which was just as well. Within 18 months, Puerto Rico needed all the power generating capability it could muster after the most devastating natural disaster in the recorded history of the island.

The damaged steel pipe was responsible for running contaminated water from a generator in the Power Station back to a treatment plant. At some point, a crack had developed in the bottom of the pipe, through which contaminated water was now escaping.

Nobody was sure how the pipe had been damaged. It was thought that equipment which had been stored underneath the pipe may have inadvertently impacted on it when it was moved shortly before the leak was noticed.

For the Power Authority to make a repair with water pressure turned off or replace the leaking pipe, the generator which was connected to the pipe would have needed to be shutdown. This would have been expensive and severely reduced the Power Station’s capacity for generating electricity.

There was also the danger that once taken out of the service, the repair could have taken a significant amount of time owing to the complications of getting parts shipped to Puerto Rico and flying in contractors to carry out the work. If all of this turned out to be too time consuming and costly, then the generator may have remained out of service.

Thanks to a Universal Pipe Repair Kit, it did not come to that. Wrap & Seal Pipe Burst Tape was applied to the pipe to seal the crack. The waterproof repair tape stretches by 300% and is twice the thickness of any other self-fusing pipe repair tape, ensuring that it fixes leaking pipes even when pressure cannot be turned off.

A SylWrap HD Pipe Repair Bandage was then applied over the Wrap & Seal. SylWrap HD set rock hard inside 30 minutes, providing an impact resistant layer and turning the repair permanent. Within an hour, the contaminated water pipe repair was completed, the generator was put back into service and the Power Plant was producing electricity at full capacity again.

Completed repair of a cracked contaminated water pipe in a Puerto Rico Power Station
The completed repair

The true value of the repair became apparent in 2017, when the category five storm Hurricane Maria hit Puerto Rico, Dominica and the U.S. Virgin Islands. It was the deadliest Atlantic hurricane for nine years and left a trail of destruction in its wake across the Caribbean.

Central to the relief efforts both during and after Hurricane Maria was keeping the power on in Puerto Rico. Six months after Hurricane Maria, the contractor who fixed the contaminated water pipe got in contact to say that without the Sylmasta repair of the contaminated water pipe, the Power Station would have had one less generator at a time when Puerto Rico needed all the power available to it.

As a result, the Power Authority were extremely grateful that such a quick and easy repair had been possible. They have since started using the contaminated water pipe case study as an example of why industry should seek repair solutions as soon as problems arise.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

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Case Study: Burst Underground Water Main is Repaired After 15 Years of Leaking

A live repair carried out on a water main which had been leaking for the previous 15 years

Repairing the unrepairable – Sylmasta devise a live leak repair method for a burst underground water main which had been leaking for 15 years

For 15 years, no contractor, maintenance company or water board had been able to find a repair method for a burst 400mm carbon steel underground water main. That was until Sylmasta devised a successful live leak repair method which was effective inside an hour.

Case Study Data


Site
Underground Water Main
Location
United Kingdom
Repair Type
Live leak pipe repair
Defect
Split 400mm carbon steel water main

Products Used


Wrap & Seal Pipe Burst Tape
Multiple Wrap & Seal Pipe Burst Tapes were used to provide a pressure resistant repair to the live leak

SylWrap HD Pipe Repair Bandage
SylWrap HD was overwrapped to offer an impact resistant layer over the Wrap & Seal

SylWrap Universal Pipe Repair Kit
All the products used in the repair are available as part of the SylWrap Universal Pipe Repair Kit for fixing live leaks

SylWrap Pipe Repair Contractor Case
A Contractor Case containing enough products to make up to six live leak pipe repairs was recommended to the contractor for conveniently fixing future bursts and leaks

Case Study PDF


Case Study Review


The large split across the diameter of the 400mm underground carbon steel water main had been considered unrepairable for 15 years for several reasons. The normal method for fixing a pipe on the underground water network would be to use a hefty pipe repair clamp, but that was not possible due to the severely confined space the main was located in.

Only a single contractor could access the water main at any one time and there was no room for any heavy equipment, including a clamp. This also made replacement impossible without digging up the area surrounding the water main.

The importance of the water main to the network meant that shutting off flow to carry out work was impractical. The only solution therefore was to find a way to carry out a live leak repair in a restricted space which could be effective even when water pressure could not be turned off – something which had proven elusive until Sylmasta were consulted.

A burst underground carbon steel water main which had been leaking for 15 years
The burst carbon steel water main was buried underground with restricted accessibility

Because of the complexity of the repair and the lack of space in which the contractor attempting to fix the burst water main had to work, Sylmasta recommended the use of multiple Wrap & Seal Pipe Burst Tape and SylWrap HD Pipe Repair Bandage.

It was decided to double wrap 400mm from the flange up the tapered pipe. Double wrapping compensated for the fact that the waterproof repair tape could not be stretched by its full 300%, which could have resulted in less effective fusion.

Applying more than the required number of tapes increased the pressure resistance of the repair. These additional rolls of Wrap & Seal bond to each other in the same way that a single tape fuses to form a solid rubber band. This repair method sealed the leak on the water main.

The Wrap & Seal was then overwrapped using several SylWrap HD 416 Pipe Repair Bandages. On a pipe 400mm in diameter, Sylmasta would normally have advised the use of an 866 Bandage but at 200mm wide by 20m long, there would have been no room to apply such a large wrap to the pipe.

Multiple 416 Bandages were used to cover the same repair area as an 866 Bandage, providing an impact resistant, protective layer to the Wrap & Seal, turning the repair permanent. Once cured, it was evident that the job had worked. Sylmasta had done in an hour what nobody else had managed in a decade-and-a-half by finding a method to repair the burst water main.

SylWrap Universal Pipe Repair Kit successfully repairs a burst carbon steel underground water main which had been left to leak for 15 years
The repair of the carbon steel water main was a complete success

Wrap & Seal and SylWrap HD both have WRAS approval, meaning that they are safe to use on drinking water. With the water main in question connected to the public supply network, any repair materials had to meet the stringent criteria set out by WRAS so as not to pose a threat by contaminating water which could be consumed by humans.

The contractor carrying out the repair was delighted that after such a long period of time, they’d finally been able to offer a solution. They said afterwards: “The repair was a complete success, as we knew it would be. The information that Sylmasta provided greatly supported the project and more importantly, future projects.”

Sylmasta have since recommended that the contractor take stock of the SylWrap Pipe Repair Contractor Case. The Case contains enough products to enable a user to carry out up to six live leak pipe repairs, allowing the contractor to fix burst and leaking pipes in under 30 minutes as soon as problems are reported.

They will never have to wait 15 years to repair a leak again.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

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Case Study: Live Leak Contaminated Water Pipe Repair at a Wastewater Treatment Works

A contaminated water pipe at a wastewater treatment works in the United Kingdom is repaired after being accidentally breached during construction work

Clearing up a mess – a SylWrap live leak repair saves a Wastewater Treatment Works from an environmental catastrophe

A Wastewater Treatment Works was undergoing a major infrastructure upgrade when contractors mistakenly cut through a 450mm steel contaminated water pipe which required a rapid live leak repair to prevent a serious environmental incident.

Case Study Data


Site
Wastewater Treatment Works
Location
Sussex, United Kingdom
Repair Type
Live leak pipe repair
Defect
Highly pressurised leak on a 450mm steel contaminated water pipe

Products Used


SylWrap Pipe Repair Contractor Case
The site was recommended a Contractor Case in the aftermath of the incident as it would enable them to carry out up to six emergency live leak repairs in the future

Wrap & Seal Pipe Burst Tape
Multiple Wrap & Seal Pipe Burst Tapes were used to increase the pressure resistance of the repair

SylWrap HD Pipe Repair Bandage
SylWrap HD provided a protective layer over the initial repair

SylWrap Universal Pipe Repair Kit
Both Wrap & Seal and SylWrap HD are available as part of the Universal Pipe Repair Kit

Case Study PDF


Case Study Review


The contractors working at the Wastewater Treatment Works in the United Kingdom mistakenly believed the pipe in question had been decommissioned and was due for removal. In actual fact, it was one of the most important live pipes on site as it was linked to all the waste treatment ponds. As a result, there was no feasible way to stop the flow once the pipe had been breached.

From the moment the pipe was damaged, the severity of the cuts inflicted to such a highly pressurised pipe resulted in a significant amount of contaminated water escaping. A rapid, live leak repair to the wastewater pipe was therefore required to prevent a catastrophic situation from occurring.

A high pressure leak in a contaminated water pipe at a wastewater plant in the UK
The break in the contaminated water pipe allowed large amounts of contaminated water to escape

The contractor contacted Sylmasta for urgent assistance. Luckily, the Wastewater Treatment Works was located less than one hour from Sylmasta HQ and so our technical team were able to rush all the SylWrap Pipe Repair products needed to the site and offer assistance throughout the repair.

Several Wrap & Seal Pipe Burst Tape were first applied to the pipe. Wrap & Seal is made from self-fusing silicone which fuses to form a solid rubber band over the hole or crack, sealing the leak. The 450mm diameter of the pipe combined with the high pressure meant that multiple tapes were needed to provide an effective seal.

This initial repair was then overwrapped using a SylWrap HD Pipe Repair Bandage. SylWrap HD is a composite repair wrap with a water-activated resin which sets rock hard in 30 minutes, providing an impact resistant layer over the Wrap & Seal to protect the repair from further damage.

Within an hour of Sylmasta being on site, the contaminated water pipe had been permanently repaired at a cost of less than £300 to the contractor. This included additional SylWrap HD should there be any further mishaps or any existing pipes require strengthening or reinforcing during the construction works.

A live leak repair made using a SylWrap Universal Pipe Repair Kit is made to a steel contaminated water pipe at a wastewater treatment works in the UK
The successful repair of the contaminated water pipe

Had a live leak repair not been possible, then the Wastewater Treatment Works would have had to shut down the entire site to isolate the damaged pipe whilst a replacement was sourced and fitted. The cost of such a procedure would have been astronomical.

The speed of the SylWrap repair also prevented a serious environmental incident from unfolding. This could have been damaging in monetary terms through the cost of a clean up operation and possible fines, and for the reputations of both the Wastewater Treatment Works and the contractor involved.

Understandably, the project manager was extremely happy with the speed and ease with which the contaminated water pipe had been repaired. He emailed Sylmasta a few days after the repair, saying: “Thank you so much, the pipe repair worked a treat.”

Sylmasta have since recommended that the Wastewater Treatment Works takes stock of a SylWrap Pipe Repair Contractor Case. The Case contains enough equipment to carry out up to six live leak pipe repairs. By keeping one on site, the Wastewater Treatment Works will have everything they need to fix any future leaks as soon as a problem arises.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com