Bit of a puzzle

[SniperFC]

I have a hot water problem that I can't make sense of.

First the stats:

Its a combi boiler in the kitchen
Were in a 1st floor flat
Water pressure is not a problem, we have the stop cock value on about 1/2 a turn, any more then that and water goes everywhere.

The problem.

Hot water int he bathroom seems to be non-existent, when it does finally come through it goes cold again very quick. The bathroom is about 10m from the boiler on the same floor. The water in the kitchen is very hot along with the toilet (next to the kitchen).

At first I thought it was the fact that the kitchen is over a communal hall way with no heating and the pipes were just very cold but this went out the window when the water went cold after being hot for a few seconds.

I just have no idea where that amount of heat could be going in such a short distance.

Any advice would be great.

Chris

 

[dextrous]

Is this true of all the taps in the bathroom, or just the bath taps?

 

[SniperFC]

Its both the sink and the bath.

Thanks for the quick reply

 

[dextrous]

Hmm, bit of a mystery this one, but a first wild guess would be that the sinks in the kitchen and WC are drawing water from the boiler at a lower flow rate than the bathroom, which the combi can handle. This could be due to a varaition of pipe sizes and/or restrictions via isolator valves.

So, if you have the hot taps in the bathroom only slightly turned on, does this make any difference?

 

[SniperFC]

I had a similar thought so I tried putting the tap on half way for a while and still the same :S

 

[dextrous]

For the sake of experimentation, what about only just on?

 

[Whitespirit66]

The water in the kitchen is very hot along with the toilet

You flush you khazi with hot water??

No recession in Devon then!

 

[mickyg]

have you got a shower?
Does the boiler stay lit constantly while the bath tap is open?
does restricting the flow bring any difference?
is this a new or always existed fault?