Attaching close couple cistern to pan

[medway]

Hi

I bought a new toilet pan to attach to the cistern I already had, however it seems that after attaching the coupling kit that it stops the cistern from sitting flush on the pan leaving a cm gap(more or less the size of the bolt heads) where once the toilet is flushed it pours out of this at the back of pan.

I noticed on the old pan that it had a moulding which you placed the coupling plate and cistern on, the new pan is just completely flat and doest have this.

Does this mean that I have the wrong cistern for this pan? Or am I just not fixing it properly, I have tried to different donuts one small one which fits in the hole and a bigger one which sits on top both have the same outcome.

Any advice greatly appreciated before I waste anymore money on this

 

[Paulus]

I'm afraid the pan is a mismatch for the cistern. The donut washer should fit tightly around the nut which holds the flush unit in place and sit over the hole in the pan so that when you tighten up the coupling from under the pan, the donut us squashed between cistern and pan creating a leak-proof seal.

You wont ever get a seal if there is a 1cm gap.

It's either exchange the pan for the correct one if you have a manufacturers name and model or ditch the cistern and buy the correct one for the new pan.

 

[medway]

yea thought so though on other forums people are saying a gap is normal! so i guess i probably need a cistern that has holes in the base for attaching to pan, I just needed it confirmed before I waste more money on a new cistern

Thanks for your reply

 

[Guest123]

If it's the thicker rubber donut washer, change it for the sponge type as these compress much easier.

 

[Paulus]

I don't think its that simple system, medway is trying to replace a screw through cistern that fits onto a specially moulded part of the pan with a cistern that requires a coupling plate.

 

[stevetheplumber]

throw the plate away and drill two holes in cysten if it breaks your no worse of

 

[REDSAW]

i probably need a cistern that has holes in the base for attaching to pan, I just needed it confirmed before I waste more money on a new cistern

well, thats where i would start!.
you have answered your own question.

do what steve says, get a diamond hole saw and drill 2 holes, if it works then you save some ££.