DIY Doctor

hot wate cylinder

Postby beth » Tue May 04, 2010 4:26 pm

hi can any one help was wondering to i actually have to replace my hot water cylinder with another or can i have a water heater reason for asking this is my water cylinder has a slight leek
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Postby stoneyboy » Thu May 06, 2010 9:38 pm

If you are suggesting replacing the HWC with an instantaneous water heater I would not recommend it.
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Postby Dave From Leeds » Fri May 07, 2010 1:34 pm


Chances are that you'll need a new cylinder. Mine sprang a leak a few years ago. It was weeping from the seam around the top. I managed to seal it for a while using a product called Chemical Metal, made by "Plastic Padding". I say for a while; it started leaking again after between 9 and 12 months so I changed the cylinder.

To seal it, I turned off the mains water, ran some hot water out of the system to get the level in the cylinder below the leak, dried it off then applied the product. Let it dry for an hour & turned the water back on.
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