Hot Water From Overflow ?

[swaters]

Just wondering if any of you guys could shed some light on this problem.

I have a Gloworm Space Saver 38 (Yeah, old I know !) in the kitchen & a hot water cylinder/tank in the back bedroom. We have the heating on quite a bit as it heats the water up in the tank - I think ? The Gloworm doesn't heat water on demand AFAIK - and we also have an immersion switch for use in the summer when the heating is not required.

After sorting the back garden out last week I noticed that there was an overflow at the back of the house - which I presume is for the tank as its on the same side of the house where the cylinder/tank is - the toilet is round the side of the house so it isn't that - which was leaking hot water out of it and down the back wall of my house. The wall underneath it is absolutely soaking so I presume it has been doing this for a while.

Do any of you know what could be causing this as I am worried that damp will begin to form in the cavity.

Thanks in advance for any help.

Scott

 

[ChrisR]

Dribbling float valve in the header tank (new washer) or leaking coil in the HW cylinder (new cylinder).

 

[swaters]

Thanks for the reply.

After checking the header tank it appeared that the ball valve was leaking so instead of replacing the washer, I replaced the whole valve including ball & arm which cured the leak.

Now 30 seconds after I turn on a hot tap I get a noise (kettling ?) through the system. This noise remains for around 30 seconds again after the tap is turned off.

Any ideas ?

The only thing I can think of is that there isnt as much water in the header tank as before when it was overflowing (a couple of inches less) - can I change the ball valve to allow more water into the header tank before the valve cuts in or is it nothing to do with that ?

Just seems strange that there were no noises when the header tank was full.

 

[Softus]

Now 30 seconds after I turn on a hot tap I get a noise (kettling ?) through the system.

"Now" is an odd word to use for a symptom that seems to have appeared about ten weeks after you did the previous work. I would say that the two aren't related.

You say that the boiler doesn't heat the water on demand - so when you turn on the tap where is the noise coming from?

 

[gas4you]

Could be the new ball valve playing up when filling. Did you fit a part 2 valve?

 

[Gasman1015]

Could be the replacement valve is not opening/closing, smoothly causing pipe chatter.

 

[JohnD]

or maybe the parts not fastened together tightly? That ringnut that holds the front part onto the tail part, y'know?

 

[swaters]

Thanks for the responses.

Sorry for any confusion - I have only just carried out the work so it has not been happening for 10 weeks.

I cannot actually pinpoint the noise but it seems to be in the pipework at the rear of the house - back bedroom (where the immersion/header tanks are) & also in the bathroom - also at the rear of the house.

I fitted a high pressure part two valve (should this have been a low pressure variant ?) - there are no leaks & it has been fitted correctly.

It could possibly be the valve as suggested - although when I opened the valve manually with my hand after fitting there were no noises.

What I find strange is the fact that when the valve was faulty & dripping constantly & there was obviously more water in the header I never heard a sound from it, hence why I asked if it would be anything to do with the volume of water in there.

I am going to have another look at it tomorrow.