Gas meters can be inside your house, like under stairs, but plastic gas piping is banned in occupied spaces. Most engineers miss this rule. Tightness tests and the right materials matter for safety and code compliance.
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I used to try and not catch people out with a question, but I used to say to people, okay, gas meter's outside the house. All right, it's on the side, it's on the side of the house in a box. And the gas is coming in, coming up out the ground into the box. I'd say to them, nothing wrong with that. You do a tightness test on that, nothing wrong with that. Right, fine. And then you come back the following year and now there's a conservatory built over, you've got a conservatory now built over that where that gas meter is. And that would be one of my questions. What are the issues now? And loads of people are thinking I'm catching them out. Oh, because you can't have a gas meter inside. We go, of course you can. There's gas meters under your stairs. Of course you can have a gas meter inside. What can't you have inside? And that's where there's technical bulletins that tell you that you can't have plastic gas supply inside.