SIAMP 99 Bottom Entry Filler Overflowing and Stopping

[RogueRogan]

Hi there,

Got problems with a SIAMP overflowing, when I've had issues in the past they've continuously overflowed. The solution was a new diaphragm washer. This time it overflows for 10s then stops.

I've replaced the washer and tried to make adjustments when it was still doing it - moved the float valve. Now getting a longer overflow - 60s and can't make it any better!

Is there a way to fix this without replacing the entire cistern? I've got another problem in that I can't get to the top of the toilet, the tank is a Siamp Intra and I'm gaining access to the front only. The top is a counter top of a vanity unit which is locked on with cam screws and a sink sat over lapping one side. I'd have to disconnect the sink and remove it to gain access which is going to be a real pain.

Any help appreciated!

 

[CBW]

These have a top cap and rubber seal, which iirc can start to fail, causing this issue. To repair might be tricky, but you can replace some of these valves easily, without the removal of the cistern.