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Ducting for gas supply through Cavity wall


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hopefully a simple one, I've got to drill a hole through the cavity wall for the replacement gas main to go from the meter box outside to inside. Can't get hold of the gas safe engineer that's doing it to confirm if there is a specific size needed for a specific duct, any pointers appreciated!

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Has the new gas main been laid? What size of pipe has been left to connect to? The pipe that comes to the meter is generally no more than 1" in diameter.

 

Provide a 1.5 - 2" hole.

 

Caveat: I am not GasSafe registered.

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4 hours ago, BotusBuild said:

Has the new gas main been laid? What size of pipe has been left to connect to? The pipe that comes to the meter is generally no more than 1" in diameter.

 

Provide a 1.5 - 2" hole.

 

Caveat: I am not GasSafe registered.

No, they have to inspect the box fitting before the main goes in next week, but it's the hole from the meter through to the boiler feed I need to make before I fit the box, has to go down the outside wall a couple of inches then through the cavity, rather than through the back of the box / spigot. 

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