Thomas Dudley Niagara / Vantage Shaped Sealing Washer — 323306
The Thomas Dudley 323306 is a genuine replacement shaped sealing washer designed specifically for the Niagara Vantage pneumatic air-operated flush valve. This high-quality rubber seal is required for maintaining a watertight closure in Vantage concealed cisterns. It is compatible with both single and dual flush models, provided the valve was manufactured after 2010. Replacing a warped or perished seal is the most effective way to stop water trickling into the pan and restore your cistern's efficiency.
Is your valve Newer or Older?
Thomas Dudley Vantage valves use two different seal profiles depending on the date of manufacture. This listing is for the SHAPED version (Post-2010).
Identification Guide:
MPN: 323306 | Outer Diameter: 65mm | Centre Hole: 38mm | Profile: Shaped/Stepped (for Post-2010 valves)
Key Features
- Specialized Compatibility: Designed exclusively for the Thomas Dudley Vantage flush valve.
- Post-2010 Version: Shaped/stepped profile specific to "New Style" Niagara pneumatic models.
- Versatile Use: Suitable for both single and dual flush cistern configurations.
- OEM Quality: Genuine Dudley product ensures a precise fit and long-lasting watertight seal.
Installation Note
Before ordering, please confirm your valve manufacture date. This seal is 65mm in diameter with a 38mm centre and has a distinctive shaped profile. To install, carefully remove the valve from the cistern, remove the old perished washer, and stretch the new genuine 323306 seal into the seating position at the base of the valve.