Flat gasket / Seating Washer for Geberit-style flush valve for exposed and concealed cistern

Flat gasket for flush valve for exposed and concealed cistern

Seating Washer for Geberit Valve – Fix Leaking Toilet Cistern

Replacement part number: 
816.418.00.1
816418001

This seating washer is designed to suit Geberit outlet valves and is ideal for fixing a leaking toilet cistern caused by a worn or hardened flush seal.
Made from premium silicone rubber, it provides a reliable, long-lasting seal and restores proper shut-off after flushing.
Fixes slow leaks and water running into the bowl
Easy DIY replacement – no special tools required

Compatibility
✔ Suits Geberit outlet valves
✔ Suits WDI outlet valves
✔ Suits Caroma, Fowler and Stylus ceramic units (post-2005)

(Designed for standard NZ/AU close-coupled cisterns using Geberit-style outlet valves)

Installation – Easy 5 Step Guide
1. Turn off the water supply at the cistern tap and flush the cistern.
2. Remove the outlet (flush) valve from the cistern.
3. Replace the seating washer and ensure the washer is lying flat on the valve seat.
4. Reinstall the outlet valve.
5. Turn the water back on and inspect for leaks.

Application
Toilet cistern repair
Fixes leaking or continuously running toilets
Suitable for DIY home maintenance