hi all,
I hope someone could help me with this as it's got me stumped and the only thing left is to try random things to try and sort it, which I don't want to to...customers getting annoyed too.
House has had new bathroom fitted by us, old bathroom had gravity shower via a (aqualisa, I think)..mixer valve. Cold tank is quite high in loft, about a meter at a guess, bathroom on 1st floor.
Pipe from cws went along loft, then down to shower, hot teed off hot feed in airing cupboard on first floor, up to the loft and along, down to shower, all 15mm, all well below cws.
We put a 2 bar pump next to hot tank in airing cupboard, redirected pipes down to pump and then back up into loft, connected to existing pipes along loft. Fitted new Victorian style concealed mixer shower.
Now what happens is when you turn the shower on you sometimes just get a drip drip from shower head and pump doesn't kick in. 'Sometimes' if you wait, or turn the hot and cold lever backwards and forwards, the drip drip will increase and the pump will start, everything's fine, doesn't sound like air coming out.
If you switch off the pump while the shower is going, the shower will continue to run, at a reduced rate. If you turn the shower off and back on without the pump on, it will continue to run on gravity only.
Trouble is, if you go back later, it goes back to drip,drip?
We've replaced ball cock on cws tank as old was scaled up, as it wasn't filling up quick enough and thought was running dry and air locking, nope.
We've replaced pipes across loft as old went up and down, nope.
Now do I need auto air vents on the supply pipes, or nrv,s?
Help.
I hope someone could help me with this as it's got me stumped and the only thing left is to try random things to try and sort it, which I don't want to to...customers getting annoyed too.
House has had new bathroom fitted by us, old bathroom had gravity shower via a (aqualisa, I think)..mixer valve. Cold tank is quite high in loft, about a meter at a guess, bathroom on 1st floor.
Pipe from cws went along loft, then down to shower, hot teed off hot feed in airing cupboard on first floor, up to the loft and along, down to shower, all 15mm, all well below cws.
We put a 2 bar pump next to hot tank in airing cupboard, redirected pipes down to pump and then back up into loft, connected to existing pipes along loft. Fitted new Victorian style concealed mixer shower.
Now what happens is when you turn the shower on you sometimes just get a drip drip from shower head and pump doesn't kick in. 'Sometimes' if you wait, or turn the hot and cold lever backwards and forwards, the drip drip will increase and the pump will start, everything's fine, doesn't sound like air coming out.
If you switch off the pump while the shower is going, the shower will continue to run, at a reduced rate. If you turn the shower off and back on without the pump on, it will continue to run on gravity only.
Trouble is, if you go back later, it goes back to drip,drip?
We've replaced ball cock on cws tank as old was scaled up, as it wasn't filling up quick enough and thought was running dry and air locking, nope.
We've replaced pipes across loft as old went up and down, nope.
Now do I need auto air vents on the supply pipes, or nrv,s?
Help.