Fernco Puddle Flange

The Fernco (previously known as Flexseal) Puddle Flange, is designed to create a watertight and radon barrier seal where pipes pass through concrete walls or slabs. It is essential in preventing water, gases, and hydrocarbons such as oil and petrol from passing through the structure or building. Puddle Flanges are commonly used in applications where pipes penetrate concrete structures, including basements, manhole chambers, and concrete tanks.

• Watertight Seal: Provides a pressure-tight seal against water and gases, including radon, ensuring the safety and integrity of buildings.
• Versatile Application: Suitable for a wide range of pipe materials and sizes, from steel to HDPE.
• Easy Installation: Quick and simple to fit, offering a practical solution that does not require adhesives, sealants, or concrete.
• High Pressure Resistance: Confirmed to be pressure-tight to 10bar through independent testing.
• Chemical Resistance: Made from high-quality EPDM, resistant to a variety of chemicals. Nitrile material is available for more aggressive environments.

• Size Range: Available from 15mm upwards.
• Material: Standard made from EPDM Rubber and 1.4301 (304) Stainless Steel. Options for Nitrile and 316 grade stainless steel are available upon request.
• Pressure Rating: Moulded Puddle Flanges are watertight to 10bar; fabricated versions to 5bar.
• Temperature Range: Suitable for -50°C to 80°C constant, and up to 100°C intermittently.
• Tightening Torque: 6Nm / 13Nm (as indicated on the product label).

Installing the Fernco Puddle Flange involves:

1. Pipe Preparation: Ensure the pipe where the flange will be fitted is clean. The flange's inside diameter may be smaller than the pipe's outside diameter and may require stretching over the pipe. Use pipe lubricant if necessary.
2. Positioning the Flange: The fitted Puddle Flange should have an outside diameter 100/110mm larger than the pipe. Slide the flange onto the pipe, ensuring it's correctly positioned.
3. Pouring Concrete: During the concrete pouring process, the rubber body of the Puddle Flange is compressed. Ensure a concrete cover of 50mm around the flange and use waterproof concrete for optimal results.
4. Maintaining Seal: As the concrete cures and shrinks, the rubber will relax to maintain a watertight seal. Ensure the pipe is fully supported to withstand the concrete pouring process.