ᐅ Not enough water from the toilet cistern or a poorly functioning toilet?

Which model is the toilet?

Nordlys schrieb:
Seriously... the toilet doesn't match the cistern. It simply needs more power. To be blunt, since Geberit cisterns are quite common, the toilet bowl was probably, as you yourself suspect, a bad purchase. Ebay classifieds... Karsten

I made a mistake in the original post – we connected the toilet to the OMEGA concealed cistern. Yesterday, I installed the bowl on a SIGMA cistern, and it works much better there. The two cisterns have a height difference of about 30cm (12 inches), which also means quite different water pressure.

I then tried to get reliable information about "compatible" bowls – unfortunately, nobody can give a useful answer. All I hear is "The bowls always fit." The only technical details I can find are about the maximum water volume – for the bowl I bought, that was 6 liters (1.6 gallons).

Both the Omega and Sigma cisterns deliver this amount, but the Sigma works notably better.

So, how can I tell if a bowl is compatible with a particular cistern?

Unfortunately, I cannot find any information from Geberit about how to adjust the flush valve in the cistern. For the dual-flush system, the diagram apparently shows several settings, but I can’t make any sense of it at all.

matte1987 schrieb:
What model is the toilet?

OBI in-house brand wall-hung rimless toilet, 145€ – that might invite some criticism, but I basically assume that after about 100 years, a toilet bowl isn’t exactly rocket science. I have no problem replacing the bowl (OBI has agreed to take it back) – I just want to know which one to get.

Does your toilet cistern not have a replaceable restrictor in the outlet? If possible, you would need to switch to a larger one. We use TeCe; there are four different restrictors available.

If only I knew... There is zero information available about this. We have Geberit Duofix Sigma and Omega.

DReffects schrieb:
He doesn’t say anything... he had offered the wall-hung toilet frame for 460€ and the seat for 247€, so we decided to do everything in-wall ourselves.

oh, I seeeeeeeeeeee, well theeeeen

this is what happens when you do everything by yourself^^ Now I’m curious again about the counterarguments

HilfeHilfe schrieb:
oh SOOOOOOOOOOOO, WELL THENNNNNNNNNNNN

this is what happens when you do everything on your own^^ Now I’m curious about the counterarguments again

I’ll make my first post here. I’m not building new, but renovating my wife’s parents’ house. Some parts were done by companies, others I’m handling myself. For example, the main bathroom downstairs was done by a tradesman acquaintance who brought in a plumber. I’m doing the small guest bathroom upstairs myself, including the in-wall flush system (Geberit Sigma) and additional installation.

This part is now finished, and although I’m basically an office person, I can say it’s not rocket science. My Geberit Sigma is connected to a Villeroy & Boch Architectura rimless toilet, and it works perfectly. If there’s any issue, I’d suspect the toilet might be causing the water not to flow correctly.

So you shouldn’t automatically assume everything is bad just because it was DIY. He didn’t even accuse the plumber of installing the concealed cistern improperly or anything like that.