Best current price£2.06from The Range
Shopping.co.uk recommended and popular offers
The Range£2.06Visit shop Thomas Dudley Diaphragm Washer For Siphon 5" Round - Ptosys367477 - Reliable Replacement - White
Visit shop2 offers from £2.06 - £2.27
View price history by clicking the chart icon.
The Thomas Dudley Diaphragm Washer (PTOSYS367477) is an essential maintenance component designed for homeowners and professional plumbers looking to restore efficiency to 5-inch round siphon systems. Its primary benefit is providing a robust, leak-proof seal that prevents water waste and maintains consistent flush performance, though users should ensure they are correctly identifying their siphon diameter before purchase, as it is exclusively sized for 5-inch models.
| Model Part Number | PTOSYS367477 |
|---|---|
| Brand | Thomas Dudley |
This washer is specifically designed for 5-inch round siphons. Measure the diameter of your current siphon plate to ensure it matches before installation.
No special tools are typically required. Basic hand tools to open the cistern lid are sufficient.
It is designed for Thomas Dudley siphons. While it may fit other brands with identical 5-inch dimensions, it is optimized for Thomas Dudley systems.
While lifespan depends on water quality and hardness, this component is designed for long-term reliability under normal household use.
This component is for standard siphon-based flushing cisterns, not for dual-flush valve systems.
Verify that the washer is seated perfectly flat and that there is no debris preventing a flush seal at the base of the siphon.
Check that the siphon unit has been fully re-engaged with the flushing mechanism and the washer is not pinched or folded.
To install, turn off the water supply to the cistern and flush the toilet to empty it. Remove the siphon assembly lid and pull out the siphon unit carefully. Remove the old, worn washer from the base of the siphon and clean any debris or mineral buildup from the seating area. Fit the new Thomas Dudley Diaphragm Washer, ensuring it sits flat and aligned within its grooves. Once replaced, reinstall the siphon and turn the water back on. To prolong the life of your new washer, avoid using harsh chemical cleaners directly inside the cistern, as these can degrade the rubber over time.
