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Discuss Ideal Standard Flush Valve ~ not getting enough water in the Plumbers Forums News and Updates area at PlumbersForums.net

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Replaced like for like flush valve in Ideal Standard cistern, but do not seem to get more than half filled, giving insufficient water for flushing, even with float (OK) at maximum. As existing valve was already fitted when renting the property have no idea whether it was correct for the cistern. Where can I obtain dimensions or full description of flush valve which should be fitted. Fed up with keep using double flushes and buckets to clear. Drains AOK from adjoining bathroom toilet.
 

Ben-gee

Esteemed
Plumber
Messages
1,702
Did you replace the flush valve or the inlet valve?
You seem to flit from one to the other in your description...?
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
Messages
26,433
So is the float free can move fully up and down ?

you might need to raise the height of the body (not the float height the whole valve )
 
Messages
3
The float is free and set at max height. The water sits at 4.5" from top of cistern. If I hold down the float the water flows through the flush valve/overflow assembly into the toilet bowl.
 

Ben-gee

Esteemed
Plumber
Messages
1,702
Sounds like you just replaced the flush valve , not the inlet valve. Anyway.

There is normally a mark/line/indent at the back of the cistern , this indicates where the water level should be.
The internal overflow should be set to about an inch above this line.

Does the water level in the cistern drop to within an inch or so of the bottom of the cistern when flushed on full flush? If not the flush mechanism needs adjusting as per instructions that came with it.
 

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