Constantly refilling dual flush valve cistern

[Anna12345]

I have a 6 year old dual flush valve cistern (Space Suite) that is constantly refilling and discharging into the pan.

Access is very tight and I am wondering whether this can be remedied through adjustments or whether a replacement washer is required?

 

[Guest123]

The sealing or diaphragm washer will most likely be in need of replacement and the seating will need cleaned/flushed out. Best to get a local plumber in as it's an easy and quick job for a professional.

 

[Destroyer2813]

Could be one of two things the ballvalve could not be shuting off or the washer on the syphon has got dirt underneath it preventing it from making a seal. Have you got the top of the cistern?

 

[PlumbBobBob]

hi anna welcome to the forums. can you get to the flush valve at all? if there is enough room to remove the valve from inside the cistern you can try turning the washer over so it seals again

 

[Guest123]

If you attempt to dismantle the fill valve by yourself, please remember to isolate the water first. Normally there is a valve on the pipework below the cistern.

Is the system you have a push button flush? I've known quite a few of these of the mechanical type to be over pressing down very lightly on the toilet syphon, causing an everending flush and fill cycle.

 

[Anna12345]

Thanks for that. Problem is plumbers are quoting £65 + for what should be quite a straightforward job! Appreciate the advice.

 

[PlumbBobBob]

get another quote if you want. if access is as tight as you say there may be a lot of work involved to get at the flush valve, the price seems about right given the circumstances.

 

[WaterTight]

that price is probably for replacing the valve. possibly because they don't fancy sourcing the exact diaphragm. in which case not a bad price.

 

[MZR]

have you removed the lid to see if its the filling valve thats over flowing of the flush valve is passing ? most flush valves can be unclipped and replaced with new ones, if its the filling valve (ball valve) you maybe able to change the washer inside to stop this overflowing, if you have a look and let us know.

 

[Anna12345]

Thanks for that. It doesn't have a ball valve so sounds like the dirt. I have attached the breakdown of the mechanism if its of interest. Apprecaite the response.