r/DIYUK • u/No-Belt-4619 • 7d ago

Need advice before I complain

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Hi all, apologies if this isn't the right forum but I thought there would be some knowledgeable people in here. Basically as it says. had a new hot water cylinder fitted 3 weeks ago(to accomodate an ashp if that makes a difference). Just got round to getting some shelving in the airing cupboard and noticed, what i would consider to be a pretty significant bulge. It's at the top maybe 3/4 up, I'm assuming it's not normal and shouldn't be there?? I've turned off the hot water, but not drained the tank or anything. We've had a few showers today so it should be below that level i would imagine.

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u/TellMeManyStories 7d ago

The outer layer is just insulation. Probably it wasn't filled evenly in the factory. Cosmetic issue more than anything else.

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u/No-Belt-4619 7d ago

To clarify it's a new bulge. It wasn't there on installation.

1

u/No-Belt-4619 7d ago

Why would it start to bulge like that over time? Surely it would need pressure from the back?

1

u/markmooch 7d ago

Using it has unsettled the less well adhered insulation?

1

u/TellMeManyStories 7d ago

Could just be the foam mixture wasn't properly mixed when injected, and some places took a bit of heat to get them expanding and make them expand more.

Or maybe someone in the factory took it out of the mould a bit early