Under carpet leak in Boiler Room - Advice greatly appreciated.

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Kudos

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Hi all, hoping someone can help. I live in a duplex flat where the boiler room is located on the upper floor. Around Mid November when the boiler / heating was OFF, I suddenly heard an almighty banging / thumping noise coming from the boiler room. It lasted for about 5 minutes which seemed like forever and was so loud that I didn't dare go into the room. When the banging finally stopped, I entered the room but couldn't see any obvious damage.

I have an Electric boiler on the wall with a separate large Water cylinder just to the right of it. They work independently of each other so hot water isn't reliant upon the boiler. In fact, I've not had the boiler / heating on since April this year. The boiler was replaced just over 2 years ago and seems to be working fine. The water cylinder is about 16 years old and has also been working fine as usual since the banging with no issues.

The banging happened around mid November but it wasn't until late November I needed to put the heating on for the first time since April. Everything worked fine. About two days later I'm walking past the boiler room on my stairs landing when my foot feels wet. The carpet just outside the boiler room has a wet patch under the carpet. I check the boiler room and there are wet patches in there too in random places with dry carpet surrounding them. At first I think it must be the water cylinder leaking but there are wet patches in random places away from the water cylinder, strangely, one water patch is all long the skirting board under the boiler not the water cylinder. There are no drips coming from the pipework above the carpet, it's definitely from underneath the carpet. The bottom of the water cylinder is slightly wet but not as wet as some of the carpet wet patches which in some places are so wet its like someone just poured a glass of water on that specific area.

I'm obviously concerned about mold and damage to my carpets, am I supposed to turn the water off to the whole flat? (I've done this now). and somehow drain the water cylinder in case that's where the water is leaking from? Not sure how to drain the cylinder, it heats up the hot water for the house every night.

I've got an electric boiler engineer coming but the earliest is next week. What should I do in the meantime? I'm hoping it is the water cylinder that is leaking and I can just replace it. The floors are all concrete. Thanks in advance for any advice.
 
That's your best bet , having a tech come out ,just by guessing it sounds like your boiler may have over pressurized and your relief valve opened or you relief valve failed to open
These are just guesses,what ever is leaking should be shut off,and the power to it you should get a professional cleaning co out there so you don't have mold or any other
Issues
 
That's your best bet , having a tech come out ,just by guessing it sounds like your boiler may have over pressurized and your relief valve opened or you relief valve failed to open
These are just guesses,what ever is leaking should be shut off,and the power to it you should get a professional cleaning co out there so you don't have mold or any other
Issues
Hi, thanks!

Is it possible if the boiler over pressurized that it could blow a hole in the water cylinder? I put a bunch of paper towels around the base of the cylinder and a few hours later they were all wet so I’m guessing it’s the base of the cylinder that’s now got a slow leak which is seeping under the carpet.

I don’t know how to cut off or drain the water cylinder to stop it leaking. I’ve cut off the mains water to the flat but not sure what difference that will make if the water cylinder is fairly full and slowly leaking? Any thoughts? Thanks again.
 
R
Your equipment maybe different then ours but there's usually a relief valve that lets excess pressure , or excess temp+pressure from a hot water storage tank if your tank is leaking the best thing you can do is shut power off to it and v
Shut off the water that feeds it but without being there it's hard to diagnose and advise you
 
R
Your equipment maybe different then ours but there's usually a relief valve that lets excess pressure , or excess temp+pressure from a hot water storage tank if your tank is leaking the best thing you can do is shut power off to it and v
Shut off the water that feeds it but without being there it's hard to diagnose and advise you
Hi thanks so much,

I’ve pulled all the carpet and underlay up and dried the whole area out, water cut off and electrics to the boiler room cut. So far so good.

I’m guessing you’re not anywhere near S.Yorks?

At least everything is dry / drying for now. Thanks for your advice, much appreciated.
 

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