Product reviewsGeberit 816.418.00.1 Replacement Dual Flush Cistern Valve Diaphragm Washer Seal

Great Product

The external diameter was a good fit but the internal diameter was too small, so I had to cut it to match the replacement. I knew this beforehand, but couldn't find an exact match anywhere. As the external rim is the only active edge, it doesn't matter about the internal rim. Finally the dripping has stopped!Read full review...

keep a spare flush valve seal/ They are easy to replace but expensive if you dont

bought as a spare after origonal leaked and was replaced
this origonal went while I was away and leaked water continually
it cost me more in water than the new one cost

Verified purchase:  Yes | Condition: new | Sold by: mr.obsessed

A well made product.

A simple silicone replacement for an existing cistern. The original was some type of rubber. which had degraded.
Very simple to fit after unclipping the assembley from the base. An easy DIY job.

Verified purchase:  Yes | Condition: new | Sold by: plumbinbitsuk

Fix the constant trickle of water down the back of the pan

If you have a grey gerebit washer they blister, then they toilet will keep on filling on its own every hour or so.

This is a dead easy fix. Unclip the middle of the flush valve from the cistern pull it out, pull off the old washer, put on the new one then make sure any writing faces up so the smooth side of the washer is on the bottom.
Clip the flush valve back in. Job done. Save money on your water meter by a 10 minute fix rather than just letting it leak. Read full review...

Verified purchase:  Yes | Condition: new | Sold by: tonyj1021

you could just prick the old one

Running toilets are, apparently a feature of older Geberit units. In my case - and I gather this is very common, we had two toilets which both started running within a few weeks of each other. Both were installed during some renovation work we had carried out ten years ago. It seems that the rubber eventually starts to delaminate and small 'bubbles' appear on the surface. Amazingly these are enough to break the seal and cause the toilet to run continuously. Prick the bubbles and hey presto - no more leaking toilet. But for the sake of a couple of quid it's worth getting the replacement (non-rubber) seal which apparently has been developed by Geberit to solve this issue. A lot of money for a plastic oval but it does the job.....Read full review...

Verified purchase:  Yes | Condition: new | Sold by: plumbinbitsuk

Cheap washer saves the planet.

The old bog sealing washer got the pox, covered in blisters and now leaked, causing a hissing sound of perpetual filling in the cystern. This soft, cheap, plastic washer replaced it, and now, much to my wifes delight, has stopped the hissing , hissing. Saved myself a £50 plumbers callout fee and getting it from here saved me a more expensive bus fare into town. Even though I'm not on a water meter, relacing the poxed washer saved the planet from a drought. Photo is of deseased washer.Read full review...

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Verified purchase:  Yes | Condition: new | Sold by: mr.obsessed

A small but effective repair item

I was having quite a bit of trouble with my concealed cistern toilet. Basically water continued to flow into the bowl at a slow rate even when the flush sequence had completed. A little research on the internet gave me confidence to remove the front panel and access the internal. components. Sequence is a) isolate the water via the internal tap b) Remove the lever mechanism for flushing c) uncouple and remove the water filling valve necessary to make room for the next step d) squeeze black tabs together at rear of flush assembly which can now be withdrawn through the (small) access aperture. The seal is at the bottom of this and stops flow into the toilet itself. Mine was distorted and had water blisters hence the leak. Replace with new and refit the whole thing remembering to turn the water back on. Hey presto no leak at all. The only question remaining is why do these seals degrade after just 5 years? I bought several of these spares so I'm am covered for a long time.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: plumbinbitsuk

Great shop, fast and great service with reasonable price!!!

Geberit 816.418.00.1 replacement does fit my existing flush valve and solves the leaking problem. My previous flush valve seal was the gray color, the replacement is clear color but exactly fit the compartment.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: plumbinbitsuk

Proven quality, bought this one as a spare.

Geberit is the producer of top quality Cisterns. I bought this valve as a replacement for one that I have just used.

Nice to have a standby spare for a quick repair.

Verified purchase:  Yes | Condition: new | Sold by: plumbinbitsuk

Does the job: hope it lasts longer than the original!

Plumber fitted it in about 20 minutes and it cured the leak from the cistern pipe.
Can't give it 5 stars as I don't know how long it will last: the original lasted just over 7 years. That didn't seem very long given the damage that water leaks cause: I have to replace the laminate plinths which swelled and burst from the leak. Close-coupled cisterns haven't given me this kind of problem in the past so the original Geberit design is a bit suspect.Read full review...

Verified purchase:  Yes | Condition: new | Sold by: plumbinbitsuk