Bathroom water supply won’t turn off

danrv

Hi
I’m in the process of renovating the bathroom in my recently moved in to house. Was taking out an old bidet yesterday but couldn’t shut off the cold water feed to it.
Main gate valve shuts off all other taps but not this one.
Have managed to cut and cap both hot and cold pipes now but it was a bit wet.

I’ve already removed the loo and sink and as the cold supply is direct, that was ok.
Turning off hot water (immersion) is no problem as there’s a gate valve on the water supply from the loft tanks.
Although I’ve got the bidet out now and have stopped the water flow, I’d like to figure out where it comes from.
It’s an all electric three bed semi detached . No wet central heating but have got three water tanks in the loft all connected.
Thinking that the bidet cold supply must come from these. The bathroom copper pipes are under the bath and can see these but not the ones under the floorboards.
The electric shower though comes off of the bath cold pipe.
Any help appreciated.

phill99

It sounds like it's tank fed.


You need to work out which tank it is fed from. Tie the ballc ock up so that it doesn't let water in.


Turn the cold tap on the bidet and let it drain the tank.


When empty, cut the bidet feed in the bathroom and cap off.

danrv

phill99 wrote: »

It sounds like it's tank fed.


You need to work out which tank it is fed from. Tie the ballc ock up so that it doesn't let water in.


Turn the cold tap on the bidet and let it drain the tank.


When empty, cut the bidet feed in the bathroom and cap off.

Thanks for the reply.
The bidet has gone now so no tap to drain the tank. I can press on anyway with renovation
and just leave the two pipes capped.
If I need to drain it then I can run a hose from the cold pipe.

akira181

If the mains valve shuts off everything apart from the bidet, it has to be tank fed. Highly unlikely for there to be a second mains feed for one outlet.

Check if there's any valves on the mains run going to the tanks to isolate them or tie off the ballcock float like Phill99 suggests. Then run the bidet outlet and see what tank drains. Not sure why you would have 3 tanks though unless your house is particularly large.

*Edit - just saw that you said the bidet is removed and you've capped the pipes. Definitely supplied from one of the tanks then, it would have been more than just "a bit wet" if it was mains pressure.

danrv

akira181 wrote: »

If the mains valve shuts off everything apart from the bidet, it has to be tank fed. Highly unlikely for there to be a second mains feed for one outlet.

Check if there's any valves on the mains run going to the tanks to isolate them or tie off the ballcock float like Phill99 suggests. Then run the bidet outlet and see what tank drains. Not sure why you would have 3 tanks though unless your house is particularly large.

*Edit - just saw that you said the bidet is removed and you've capped the pipes. Definitely supplied from one of the tanks then, it would have been more than just "a bit wet" if it was mains pressure.

Thanks for the reply.
House isn’t particularly large. The tanks are fairly compact so maybe just easier to install like this.

nofoollikeold

An "ascending spray" type of bidet must be fed with both hot and cold water from a supply with a air gap between the mains and the outlet. The only really practical way of doing this is to use a break tank. Hence three tanks in loft, cold water storage cistern, feed and expansion, and additional tank to feed the bidet.

danrv

nofoollikeold wrote: »

An "ascending spray" type of bidet must be fed with both hot and cold water from a supply with a air gap between the mains and the outlet. The only really practical way of doing this is to use a break tank. Hence three tanks in loft, cold water storage cistern, feed and expansion, and additional tank to feed the bidet.

Thanks for the reply.
The bidet had a regular mixer tap like a basin.