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Plumberpro
Plumberpro, Home Appliance Technician
Category: Appliance
Satisfied Customers: 634
Experience:  Heating and hot water heating appliances experienced
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My bath tap with hand shower fitting lets me have hot water

Customer Question

my bath tap with hand shower fitting lets me have hot water through the hand shower but will only let me have hot water through tap if I turn down to a trickle,it is all supplied by a combi boiler.
Submitted: 2 years ago.
Category: Appliance
Expert:  Plumberpro replied 2 years ago.
Hi it sounds like you have a manual mixer .
With a combi a thermostatic mixer is best as it regulates the temperature.
With a combi often the water pressure on the cold is higher than the hot as the hot has to go through the boiler and comes outwith less pressure than the cold .
By turning the hot down to a trickle you are increasing the temperature as it rus through the boiler slower therefore getting more heat from the burner.
The way to solve it is to get a thermostatic mixer, they can be bought for £50.