I have a toilet cistern which will not flush until 2 or 3 pumps of the handle. What is the problem and how can it be fixed?
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Toilet flush problem
- Thread starter hemelhandyman
- Start date
If you have a firm bit of plastic you can use this to replace the perished one by cutting out with a template. Easier to buy a new one though 
- Joined
- 7 Dec 2009
- Messages
- 103
- Reaction score
- 8
- Country
1. isolate the water supply to the float valve (or if there isn't one fitted, close the main stop cock)
2. empty the cistern by flushing as best as you can, then finish it off with an aquavac (I use an old Vax)
3. Undo the two nuts under the cistern (if you have a low or high level cistern) and lift the siphon to unhook the handle
4. Clean the area around the hole in the bottom of the cistern
5. If your float valve looks like it's seen better days take this opportunity to replace it with either a brass part 2 or plastic part 3 float valve
6. Get a turbo siphon (internal overflow) and fit with new seals - DON'T use silicone a. it contravenes water byelaws and b. the rubber seal doesn't get compressed properly because it'll slide out under compression - don't forget to put flushpipe nut then seal on first, reconnect the handle loop, then tighten the backnut up enough so the siphon doesn't move
7. slide flushpipe seal into place (I've recently started putting a few wraps of ptfe around the joint because it's not easy to make these seal straight off) then tighten the seal nut
8. fit your new float valve - you'll need to adjust water level after
9. if there isn't a service valve, fit one as close to float valve as possible - this is required under water byelaws
2. empty the cistern by flushing as best as you can, then finish it off with an aquavac (I use an old Vax)
3. Undo the two nuts under the cistern (if you have a low or high level cistern) and lift the siphon to unhook the handle
4. Clean the area around the hole in the bottom of the cistern
5. If your float valve looks like it's seen better days take this opportunity to replace it with either a brass part 2 or plastic part 3 float valve
6. Get a turbo siphon (internal overflow) and fit with new seals - DON'T use silicone a. it contravenes water byelaws and b. the rubber seal doesn't get compressed properly because it'll slide out under compression - don't forget to put flushpipe nut then seal on first, reconnect the handle loop, then tighten the backnut up enough so the siphon doesn't move
7. slide flushpipe seal into place (I've recently started putting a few wraps of ptfe around the joint because it's not easy to make these seal straight off) then tighten the seal nut
8. fit your new float valve - you'll need to adjust water level after
9. if there isn't a service valve, fit one as close to float valve as possible - this is required under water byelaws
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