Plumbing, toilet flush pipe.

I eventually got the toilet pan /vanity unit connected, all went well and no leaks on the pipework.

Last stage connecting the toilet pan, waste pipe no bother but had issues with the flush pipe at the cistern end, the push on ridged seal kept sliding back out, I checked and double checked the alignment and the length...all ok.

I then removed the pan and tried to insert the pan end of the flush pipe on its own (not connected to the cistern) and still it kept popping out (confirming not the alignment) I eventually got it connected and no leaks so far but I am not confident, so will keep an eye on it for the next few days.

If I have to dismantle again is there anything else I can try?

ss expressed precisely :

Did you mean the pan end there?

I had trouble getting my two to fully seal. I eventually used some silicon sealant on the nylon ridged seal face, with a smear round the pipe before pushing them in. I boiled the nylon seals first, to relax the ribs, because they were a bit distorted, before fitting.

Yes I meant the pan end, when I had the pipe disconnected from the cistern I tried with both lubricant and without. Its kind of jammed in for now with the cistern end connected it sort of stops it sliding back out. Flushed several times and no leaks.....yet.

I couldnt see any distortion on this one and it came as part of the unit. If it does start to leak at least I wont get a flood (hoping) as the bulk of the water will flush in to the pan. I am not going to silicone around the base of the pan for a few days to see if it remains leak free.

I dhad this with a ribbed seal. I peeled back the outer rib and filled the cavity with silcone

Its been fine the last 17 years...