Gas Pipe beneath Beam and Block

[Mikey999]

On my new build, the ground floor construction is beam and block with a void below, vented as usual to the outside via air bricks. The Gas meter will be at one side of the house, and at the other side, 20 meters away will be the gas boiler. Whilst I have access to under the house, is it possible within building regs to lay a (say 20mm) yellow MDPE pipe to use for gas. If it is one continuous run, my hope is that the gas Safe installer of the plumbing will be happy to sign it off...I'm aware they could refuse. My question though is does anyone know if this is likely to be OK with building control ?

Thanks!

 

[Newboy]

With a 20 m run after the meter, 20 mm pipework may be undersized depending on what your installing in the way of gas appliances. You need to talk to and agree with your GasSafe engineer what is needed. I'd be surprised if you could find a GS engineer happy to sign off unseen MDPE under a building.

 

[Mikey999]

thanks for the reply, are you suggesting it is possible then (subject to sizing and the gas safe engineer being happy) - I just wanted to know really if it's within building regs or if the pipe needs to be buried under earth as I'm struggling to find guidance on it ? If it's likely to be possible then I'll contact a gas safe engineer (likely the one I'll use) to pop by and check he's happy with it.

 

[Newboy]

You can't just lay a piece of MDPE in the void

 

[oilboffin]

I'd go round the outside you don't want a gas pipe in the void if it gets a pinhole you could end up in a world of hurt.Bob

 

[Mikey999]

I'd go round the outside you don't want a gas pipe in the void if it gets a pinhole you could end up in a world of hurt.Bob

Thanks for your info bob, going round the outside is feasible, just is a lot more work... but thanks for expanding on why.