PVC Wafer Flap Check Valve – EPDM and FPM Seal Options, 63mm to 315mm

The PVC Wafer Flap Check Valve is a non-return valve in wafer configuration designed to prevent backflow in PVC pressure pipe systems. The dual-disc flap design allows flow in one direction only — when flow stops or reverses, the flaps close automatically under spring action. Fits between standard flanges (no solvent-weld or thread required). Available with EPDM or FPM (Viton) seals to suit different applications. Sizes from 63mm to 315mm.

• Valve type: Wafer flap check valve (non-return / backflow prevention)
• Fitting method: Wafer — clamps between standard flanges
• Seal options: EPDM (water, irrigation) or FPM/Viton (chemicals, solvents)
• Sizes: 63mm to 315mm (see variants)
• Body material: PVC

Key Features

• Dual-disc flap design – fast closing action to minimise water hammer
• EPDM and FPM seal options – EPDM for water and irrigation, FPM/Viton for chemical compatibility
• Wafer body – fits between flanges in large-bore PVC systems, easy to install and replace
• No manual operation needed – opens on forward flow, closes automatically on reversal
• Wide diameter range 63mm to 315mm – suitable for irrigation mains and commercial distribution

Typical Applications

• Backflow prevention on large-diameter irrigation mains
• Pump discharge lines to prevent back-siphoning when pump stops
• Water treatment and distribution systems
• Chemical and process pipelines (FPM seal option)
• Flanged PVC pressure systems requiring a non-return valve

Technical Specifications

What's Included

• 1 x PVC Wafer Flap Check Valve (selected size and seal type)

Please note: Flanges, bolts, and gaskets are not included. Confirm flange drilling pattern and pipe size before ordering.

Installation & Compatibility Notes

Select the correct seal material for your application — EPDM is standard for clean water and irrigation, FPM (Viton) is required for chemical or solvent compatibility. Install with arrow markings pointing in the intended direction of flow. Confirm flange drill pattern matches your pipe system.

Warranty & Support

This product is supplied with the applicable manufacturer or supplier warranty. Contact Zisabo if you need help selecting the correct valve size or seal type for your system.