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chipenter:
Push fit water pipe will withstand 1500 psi , Toolstation sells black water pipe as air pipe and fittings but they are the same as domestic 22 or 25mm pipe holds a lot of air .

PekkaNF:
I thought that the pipe I linked is the one?

Build Plumb Plastics supply MDPE water pipe (Alkathene) in diameters including 20mm, 25mm, 32mm, 40mm, 50mm and 63mm, in coil lengths of 25m, 50m, 100m and 150mtrs. Our pipe and fittings are WRAS approved and conform to BS EN 12201.

We stock MDPE in both blue and black. Blue is for potable (drinking) water and black (pumping main) is primarilly for non-potable water i.e. seawater, pumped foul & grey water etc. 

https://www.plasticdrainage.co.uk/mdpe-water-supply

Anyway, that was usefull information. But just to confirm: Are we talking about same product?

Muzzerboy:
There are compressed air versions of the push fit systems we see as plumbing systems, made by the likes of John Guest etc. Toolstation stock some of them. Look in "compressed air tools" https://www.toolstation.com/power-tools/air-tools-compressors/air-tools/c256

Not much point using plumbing components when pukka compressed air components are available? They don't look a lot more expensive. I expect other stockists keep a broader range of parts.

There's potentially(sorry!) a LOT of energy stored in compressed air, so you may need more than just brown / rubber underwear if one of those fittings came loose....

awemawson:
Push fit water pipe will withstand 1500 psi


No way would I run 25 mm water pipe at 1500 psi as quoted above. 150 yes no problem

This is the stuff I use (I keep a stash of spare!)

Pete W.:
Andrew,

You really ought to keep caps on the ends of your stash of pipe - you don't want to give any sheltering spiders the bends when you cut off a length to put into service!! 

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