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Old 5th November 2019, 19:33   #8
max1
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[QUOTE=stevestrat;2773608]Its a slightly weird, hybrid, system. Mains water feeds a combi boiler, kitchen etc, the tank seems to only feed the cold tap on the bathroom sink and toilet, maybe the shower as well I object to getting someone in for what is a simple job, its just getting at the bl00dy thing, dumb idea to put it at the back of the tank! The valve is entitled to be tired, it probably dates from when the cottages were originally renovated about 50 years ago.

From your description it would seem that your bathroom's cold plumbing is piped up as a low pressure system, ( tank fed ). This was sometimes done so that early mixer shower valves and bath mixer taps were operating on equal pressures when being used.
I assume that when the combi boiler was fitted the existing shower valve was not compatible to the new boiler, and therefore left to run on the low pressure set up.

A solution to your problem may be to change the shower valve to a combi compliant model, then reconnect your low pressure cold supply to the toilet, basin and bath back onto the cold main. You would then be able to terminate the use of the tank.

It sounds slot of work, but to connect the low pressure cold could easily be done in the roof space by redirecting the cold mains supply to the tank to connect onto the low pressure cold pipe from the tank.

Hope this makes sense.
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