My new loo.... is this correct?

[bennyt]

Hello,

I have been installing a new bathroom, and finally got to the loo. I have gone for a closed coupled, push flush. All seems to be going well.

I have a simple question, and it might sound daft...

I got the new float valve (it is a equilibrium float valve) and blew through it. As i was blowing I lifted the valve expecting the flow of air to stop, but it didn't. Surley lifting the float should stop all air going through...

Then I thought, what does equilibrium mean... and wondered if someone with experience could put my mind at ease before I turn the water suply on, and the valve doesn't shut off....

Thanks in advance - Ben.

 

[Burnerman]

Some valves need considerable pressure to get them to close....I'm not saying you're wrong though!
Stand by at the stopcock when you test it!
John

 

[Nige F]

(Equilibrium = ) Equal pressure either side of the diaphragm - water pressure @ 3+ Bar. Not someone blowing up it

 

[TicklyT]

When you close the float operated pilot valve there's a short delay as the pressure equalises on either side of the diaphragm. Then the main valve closes as Nige F said.

I'm not surprised it doesn't work by blowing down it, air is compressible, and much less viscous than water, and you would have to be very lucky - or extremely fit - to achieve a high enough pressure to shift the diaphragm before running out of breath. IIRC a good pair of lungs will only deliver about 5 litres of air at about 0.04 Bar of pressure.