Having a loft conversion done currently (by a professional company), and they've run into a problem today. As I don't want to pay £3.5k for a combi boiler they've moved the cold water storage tank to the eaves (lowering it about a metre in the process), and redone the pipework to the cylinder below. As a consequence the hot water taps don't work, as air is drawn into the system from the vent pipe instead of water flowing.
I didn't understand what the plumber said he was going to do, but he suggested something like a one-way valve on one of the pipes so the air couldn't drawn in. He didn't have one with him, so he's due back tomorrow to finish off (and I have no hot water for tonight).
Having read another thread on this subject I'm concerned he's suggesting doing exactly what was objected to in that thread, ie, adding an anti-gravity valve to the vent pipe.
Is this really a big no-no? I just need some evidence (plumbing regs?) to confront him with if that's the case. What other solutions are there? The tank can't be raised any more as there no more room in the eaves.
I didn't understand what the plumber said he was going to do, but he suggested something like a one-way valve on one of the pipes so the air couldn't drawn in. He didn't have one with him, so he's due back tomorrow to finish off (and I have no hot water for tonight).
Having read another thread on this subject I'm concerned he's suggesting doing exactly what was objected to in that thread, ie, adding an anti-gravity valve to the vent pipe.
Is this really a big no-no? I just need some evidence (plumbing regs?) to confront him with if that's the case. What other solutions are there? The tank can't be raised any more as there no more room in the eaves.