installing cloakroom suite

[UnionJack]

hi im new to this so any help would be appreciated

I am installing a cloakroom suite at the moment, the toilet is not a problem as there is an isolating valve where i can shut off the cold feed to it.

The basin is a bit differant, their is no isolating valve on either the cold or hot water supply to it. The cold water is supplied to it via the mains.

As far as i can work out i will need to shut off the mains and drain down the cold water supply to the basin, as far as the hot water supply is concerned i will need to drain down the entire system or at least bung the cold feed tank and drain from that point down.

As this would mean emptying the cylinder is it best that i turn off boiler.
My reasoning behind this is im concerned that the boiler will still be trying to heat the water in the cylinder which will obviously be empty - and im not sure whether ths will affect the cylinder in any way.

sorry if this sounds a bit daft

thanks

 

[ChrisR]

You won't be emptying the HW cylinder, the water comes out of the top of it.

There should be valves on the outputs from the cold water tank/cistern in the loft. If you have to drain down it might be worth putting some in; use full flow ball valves.

 

[JohnD]

The hot water cylinder will not be empty as long as you "drain" the hot water by opening a hot tap.

the taps draw water from the top of the cylinder, so even when you drain it, it will be full up to the top.

Personally I'd turn the boiler off anyway.


Not quick enough!

Anyway, if you turn off the supply and open the taps, you don't need to fully drain the system. Once the pressures dropped you can cut and fit your stopvalves, a bit of water may dribble out until they're tight and you close them.

 

[UnionJack]

cheers guys, wasnt sure whether just turning it off was ok, but ill play it safe and turn it off anyway

thanks again