I am posting this again as suggested by Admin.
I have just had my hot water tank changed as the old one kept causing the electrics to trip out due to the build up of lime scale and silt over a 50 year period and it had also started leaking. The hot water tank is in my airing cupboard next door to the bathroom in a position slightly higher than the bath taps so the flow previously was never that great but acceptable. I live in an ex council maisonette and cannot move the tank to an alternative position. I don't have a loft or heating system other than under floor heating and a few electric radiators. The taps are separate taps and the plumber who installed the new tank has been out 4 times now to try and solve the problem and think he has now given up. He is saying that the next step is to completely replumb the bathroom but I have already spent in the region of £1k and not prepared to spend anymore until I know what the problem is.
The cold tap receives mains pressure water directly, so there is no problem with that, while the hot tap receives water under gravity from the tank. When the water in the tank is completely cold it runs at an acceptable level to fill the bath, however when the water is hot it only trickles very slightly through the tap. The hot tap downstairs in the kitchen runs a bit faster and we can live with that.
After installation the plumber thoroughly flushed the whole system out so there was no air present and when he connected the tank fill water main directly to the hot tap pipework to test for blockages there was no pressure loss so he (and we) are at a loss as to why the hot water will not flow through.
How can the same water from a tank flowing under gravity operate perfectly well when the water is cold but not when the water is hot when it takes exactly the same route from the incoming water main?
Any advice or help would be greatly appreciated. Thank you.
I have just had my hot water tank changed as the old one kept causing the electrics to trip out due to the build up of lime scale and silt over a 50 year period and it had also started leaking. The hot water tank is in my airing cupboard next door to the bathroom in a position slightly higher than the bath taps so the flow previously was never that great but acceptable. I live in an ex council maisonette and cannot move the tank to an alternative position. I don't have a loft or heating system other than under floor heating and a few electric radiators. The taps are separate taps and the plumber who installed the new tank has been out 4 times now to try and solve the problem and think he has now given up. He is saying that the next step is to completely replumb the bathroom but I have already spent in the region of £1k and not prepared to spend anymore until I know what the problem is.
The cold tap receives mains pressure water directly, so there is no problem with that, while the hot tap receives water under gravity from the tank. When the water in the tank is completely cold it runs at an acceptable level to fill the bath, however when the water is hot it only trickles very slightly through the tap. The hot tap downstairs in the kitchen runs a bit faster and we can live with that.
After installation the plumber thoroughly flushed the whole system out so there was no air present and when he connected the tank fill water main directly to the hot tap pipework to test for blockages there was no pressure loss so he (and we) are at a loss as to why the hot water will not flow through.
How can the same water from a tank flowing under gravity operate perfectly well when the water is cold but not when the water is hot when it takes exactly the same route from the incoming water main?
Any advice or help would be greatly appreciated. Thank you.
