The tee I could see up in the roof is positioned about 6 foot above the top of the immersion tank.
we know the pressure is going to be low due the the pipe going back into the loft. the only way to sort that is raise the tank.
but your taps shouldn't run then just stop that tells me any air from the cyl is not escaping up and out the vent its getting stuck somewhere and stopping the flow.
if you turn on the bath hot tap and where that bend is above your cyl see if you can push it up slightly to prove air isn't getting stuck in the horizontal pipe.
if not its getting stuck further up maybe in the loft horizontal pipework
To be honest best advise for you (since im guessing this kind of thig isnt your forte) is to call a decent plumber out to sort out the dodge piping!
The tee I could see up in the roof is positioned about 6 foot above the top of the immersion tank.
does the pipe then go vertical to the tank or horizontal then vertical to the tank.
To be honest best advise for you (since im guessing this kind of thig isnt your forte) is to call a decent plumber out to sort out the dodge piping!
Does that piping sound wrong to you then??
Where would an immersion tank/pipework normally be fitted in a bungalow??
no raise the loft tank.
can you with a rag etc push that bend upwards slightly just to take the horizonal off it. and any air trapped their will move.
turn the bath hot tap on first.
1 thing to cheak that can cause the taps to run dry after a while is that the open vent (the pipe that comes off cylinder at top and they "hooks" over the cold water tank in the loft) isnt in the water in the tank.
Could have been too long and water in tank risen due to faulty ball valve or whatever, so Cheak your open vent hasnt slipped or has been submerged into the water in your tank in loft, this will cause water to "dry up"
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