Geberit enclosed cistern

[Seamus999]

I have an older Geberit, installed in 2009 (see photo). All the videos that I can find are about much newer models. No matter where I set the fill level, it over fills and pours down the overflow into the bowl, causing the filling to continue forever. The filling mechanism is quite recent, but clearly has a problem. Does anyone have this model, and how should I proceed? Thanks.

 

[Julie Street]

You need to fit a new diaphragm, go to toilet spares.co.uk to find the right one.

 

[Seamus999]

Thank you, Julie. That’s the information that I need.

 

[Ben-gee]

If it’s new, it is unlikely to need a new diaphragm. More likely is that there is some grit in the valve that is stopping it shutting off. Remove the valve, dismantle/clean/reassemble - before refitting it run some water into the cistern to clear the supply pipe.

 

[Seamus999]

Thank you. I’ve taken it out and cleaned it and restored it and it’s working so far. But, it had been working intermittently. Just in case, I’ve ordered a replacement part. I replaced it a few years ago (3 or 4) but had already forgotten how to take it apart. This time, I’ve made notes. The part is branded SIAMP.