Inlet valve won't close off water. What's the problem

Diaphragm washer wrong way round?/needs new washer/o-ring? /swing arm needs adjustment? Try looking on Youtube

need a replacement plastic retaining clip, that holds these in the housing,(edges disintegrating).anyone know where?

Had the same problem but unable to find a separate part - replaced the complete housing cylinder for less than £3

Will this fit a Dudley inlet valve?

Sorry no idea what a Dudley inlet valve is. I have fitted this type of washer in about 4 different properties over many years to various cisterns

Is this the part that stops that horrendous noise when you flush. Is it a generic size?

The diaphragm washer is to stop the flow of water when the water tank is full , it's also called a ball valve. The noise you hear when re-filling the tank can be reduced if you are able to reduce the water pressure and slow down the flow. This can be done outside the tank on the incoming water supply (copper pipe) if you have a shutoff valve which shuts off the water and can be adjusted with a small screwdriver.The diaphragm washer won't stop the noise.

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🚿 Upgrade your flush game with Thunderfix precision!

BULK PACK CONVENIENCE - Five washers per pack to keep your maintenance routine uninterrupted and cost-effective.
LIGHTWEIGHT COMPACT - At just 10g each, these washers are easy to handle and store without clutter.
PREMIUM RUBBER DURABILITY - Crafted from resilient rubber to ensure long-lasting leak-proof performance.
PERFECT 32 MM COMPATIBILITY - Seamlessly fits standard 1¼" cistern float valves for hassle-free installation.
CERTIFIED QUALITY ASSURANCE - Meets UK and EU standards, guaranteeing reliable and safe plumbing repairs.

The Thunderfix Diaphragm Washer is a high-quality rubber replacement part designed for 32mm (1¼") cistern float valves. Sold in packs of five, it offers durable, certified performance that ensures leak-free operation and easy installation, making it an essential upgrade for efficient toilet maintenance.

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Manufacturer	Thunderfix
Part Number	100087
Package Dimensions	10.5 x 5 x 1.7 cm; 10 g
Item model number	100087
Size	32mm / 1 1/4 inches
Material	Rubber
Item Package Quantity	1
Certification	UK and EU standards (specific not stated)
Batteries included?	No
Batteries Required?	No
Item Weight	10 g

Thunderfix Diaphragm Washer for 32mm/1¼" Cistern Float Valve (Pack of 5)

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