Toilet Issue

[CountryFan]

I don’t think a traditional syphon would fit that cistern, plus you wouldn’t be able to flush it normally anyway. Well done you.

 

[HERTS P&D]

Call a plumber out to fit the new flush valve you have bought, once fitted, they are easy to repalce yourself.

Andy

 

[ChrisJP]

I don’t think a traditional syphon would fit that cistern, plus you wouldn’t be able to flush it normally anyway. Well done you.

Even if you could fit a syphon into a modern 6 litre cistern, I don't think they'd be enough water in the cistern to reliably start the syphon. That's why the move to small 6 litre cisterns forced the abandonment of syphons and the introduction of leaky bottom flush valves. The forced move to 6 litre systems to save water had the unintended, or more likely the un-thought-through, consequence of actually wasting more water because of undetected leaks from bottom flush valves.