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Water in cwst is warm.

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armyash

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Went to a house on the weekend, water in cwst is warm. Customer said they think overflow has been running.

ball valve not letting by, what should I be looking at first?

Cylinder stat seems ok.
 
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I'll try and explain the set up.

Town house.

Cupboard on top floor housing x2 cost and f and e tank. Cylinder in same cupboard.

Someone else has been out since and said the cwst needs putting in the loft.

There is a pump in the same cupboard. Not entirely sure how it's piped but the pump makes a noise if the toilet is flushed on the middle floor. No showers on mains.
 
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I'll try and explain the set up.

Town house.

Cupboard on top floor housing x2 cost and f and e tank. Cylinder in same cupboard.

Someone else has been out since and said the cwst needs putting in the loft.

There is a pump in the same cupboard. Not entirely sure how it's piped but the pump makes a noise if the toilet is flushed on the middle floor. No showers on mains.
 
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Seen it a few times usually with monobloc sink mixer somewhere.
Mains going through to the hot side because of a hole in the body of mixer letting it permanently go into hot cylinder and up to cwt, even while mixer isn't being used.
Found it to be happening on 2 brand new mixer tap jobs
 
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Can be the tap thing, or heat can be creeping up the cold feed being so close. Can also be boiling over, poor circulation,poor cold feed/expansion arrangement, or sludged up.
 
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armyash said:
How quick could you confirm it was the tap?
Click to expand...

I know one job where a plumber had been going to the overflowing cwt on 4 occasions and charging the elderly man each time. Plumber claimed it was the ballvalve.
I actually told the customer on the phone it could be his copper cylinder or a tap causing it.
When I looked at the job, all I did was shine a torch in the inside of cwt, onto the tank fitting outlet feed to hot cylinder. A haze of warm water could be seen.
A new monobloc kitchen mixer and a new deck mixer in the garage sink had been previously installed, so I guessed it was the monobloc and disconnected the hot pipe and water was passing out from mains side. So about 5 minutes for me on that one.
 
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armyash said:
How quick could you confirm it was the tap?
Click to expand...

same as best answer,
shine torch in cwst and watch thermal haze.
turn iso's of at mixer or cap off one feed to it. re check cwst or leave for a day or two and confirm.
when customer knows they may save a few hundred there quite happy to test.
i bet theres a way of plugging the cold feed with a pipe and lifting it out of the tank to dee if it pours out!!
 
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