Flexseal Puddle Flanges ensure a watertight and pressure-tight seal where pipes pass through concrete walls of any structure or building.
Flexseal Puddle Flanges ensure a watertight and pressure-tight seal where pipes pass through concrete walls of any structure or building.
When a pipe is required to pass through a wall or concrete structure it is usually cast at the point of construction. The concrete will not bond to the pipe and will usually shrink during curing, leaving an ingress path along the outside of the pipe allowing materials such as water, gases and hydrocarbons to pass through the structure or building.
We’ve been supplying Puddle Flanges around the world for over 20 years and within that time we have perfected the design to overcome many common technical issues. The unique Flexseal Puddle Flange is specifically designed to connect onto the outside of a pipe which is then cast in concrete. During the casting process the puddle flange material is compressed and when the concrete shrinks during curing the puddle flange material relaxes to block any ingress paths, providing a pressure-tight seal against water, gases (most commonly radon) and hydrocarbons such as oil and petrol.
Flexseal Puddle Flanges provide a quick, easy and effective solution. They can be connected to all standard pipe materials such as steel, plastic, stoneware, concrete, cast iron, HDPE etc from sizes 22mm outside diameter to any size above manufactured to project requirements. Common applications include, concrete walls, concrete tanks, manhole chambers, shafts, floor slabs/foundation plates and basements.
We put our Puddle Flanges through independent testing to ensure you’re confident that they are manufactured to the highest quality standards and are a reliable solution. Independent tests of the pressure-tightness and seal effectiveness of the Flexseal Puddle Flanges has been conducted and Flexseal can confirm that they are pressure-tight to 10bar.
As standard Flexseal Puddle Flanges are made from high quality EPDM. The material is chemically resistant to a wide variety of chemicals, documentation showing which chemicals is available on request. In applications where the surrounding area is contaminated with more aggressive substrates or there is a possibility it could potentially become contaminated then we can manufacture Flexseal Puddle Flanges in Nitrile material.
Flexseal Puddle Flanges are manufactured in compliance with ISO 9001:2015 quality standards. The products are made from high quality EPDM (conforming to EN 681) and grade 304 stainless steel as standard. Other materials are available upon request such as Nitrile and 316 grade stainless steel.
Flexseal hold a vast range of Puddle Flange sizes available as part of a common standardised moulded stock. We also hold a large amount of Puddle Flange strip ready to be jointed/vulcanised to any size required enabling us to react to customer requirements quickly.
