kitchen monobloc

[bashersmith]

I have recently fitted a monobloc tap for my mother she says that the tank overflow in the loft area is now overflowing. Could this be anything i have done or is it just a coincidence?

 

[gas4you]

I would think it is just a coincidence or at a push when you turned off water and drained pipes etc. the ball valve dropped and now is not re-seating fully closed, again nothing you done directly.

Change the ball valve and all should be well again.

 

[bashersmith]

Thanks for rapid reply Dave.
Just a thought but i have not fitted any non return valves to either water supply, could this cause cold water pressure which is mains to force its way into hot water tank and up through vent into cold cistern or would this not be possible. Monobloc i have fitted seems to be of a single outlet design, not sure what original monobloc was as it has since been binned.

 

[gas4you]

Yes there is an outside chance this could be the problem. You would have to have hot and cold both on together for this to happen.

You could turn them both on and then watch the level in the tank

 

[bashersmith]

Sorry to keep on about this. My Mother is on holiday at the moment and i have no access to her house, turned mains water off before she went as she was worried. Just want to get as much info as possible before she returns. For this back pressure or whatever its called, both taps would presumably have to be on for quite a while for this to happen, not just filling a sink.

 

[gas4you]

I would think so.