Mulitquick concealed cistern

[Matt0029]

Any one know if you can still get syphons for these concealed cisterns

 

[Matt0029]

Has a leak were the sphyon sits in the cistern

 

[Matt0029]

If I take the cistern off and take the syphon out would any 1.5inch syphon washer fit to seal it. It's leaking through the seal were the syphon sits on the cistern. Tried tightening in place no look.

 

[Matt0029]

Sort of just after a temporary fix as there having a new bathroom soon