On 07/04/2018 20:23, Roger Hayter wrote:
Ciaran flanagancaedfaa9ed1216d60ef78a6f660f5f85_12720@ex ample.com
wrote:

Can somebody help me.
I have a combi boiler, when I run a bath the water is only hot if I keep the
tap turned low, (minimal pressure)
If I open the tap fully the water is tepid.
However the kitchen sink does not have this problem.
My bathroom and kitchen are on the same level (next to each other)
I am wanting to fit a mixer tap shower but need to resolve this problem first.
Is this a blockage? In the pipe, however no pressure is lost,.
Or is it because the taps on the bath have a wider outlet flow than the
kitchen sink, therefore the boiler can't heat the water up fast enough?
Please can someone advise.
Thank you

Most likely your last theory is right, what happens if you adjust the
bath tap to about the same flow as the kitchen tap? Test by timing
filling a bucket if not sure. Should still be enough for a reasonable
shower. What power is the combi?

Another possibility if the amount of hot water seems less than it used
to be is a problem with the valve switching off the central heating when
hot water is demanded, but there may well not be anything wrong.



Wot he sed. Make sure you're comparing apples with apples. If you can
really get a much higher flow rate of properly hot water from the
kitchen sink than from the bath, there's something very odd going on.

Don't forget that the incoming cold water is much colder this time of
year than in the summer, so the boiler has a lot more work to do to make
it hot - limiting the rate at which it can produce hot water.
--
Cheers,
Roger
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