Mdpe pipe for air line

[Lincs Lass]

Think this has been brought up before but I want to install a permanent air line away from the compressor .
Theres loads of old black pipe in the sheds here that have all the fittings to get from 1/2inch bsp malleable iron onto the black Mdpe .
I can get reducers to go from 1/2 - 1/4 PCL but will mdpe be ok for air pressure ,,compressor is a 150ltr ,10 bar max ,
Presently have a long 8mm rubber pipe to where I use it most but as a fixed pipe ,Im thinking the 1/2 inch would have more volume

 

[mo!]

MDPE is fine, but it should be black.

 

[phillipe]

A mate has it in his garage ,works fine ,only thing he has a tap to turn the system off ,at night .its blue 25mm ,works fine

 

[Courier]

Its cheap enough - Use 25mm.

 

[Lincs Lass]

A mate has it in his garage ,works fine ,only thing he has a tap to turn the system off ,at night .its blue 25mm ,works fine

Ive got a tap on the tank already ,,thought it make good use of perfectly usable pipe thats only going to get trashed

 

[Mursal]

Yes go 3/4" or 1" if you have the pipe, it will act like a small tank, right beside where you want the air.

Edit:
Tie it well to the wall so it can't recoil if you do get a weak spot.

 

[quattro]

Used blue25mm for last 10 years into 3 different buildings never had a problem

 

[spanners and hammers]

dont forget to put a low point with tap to drain water,,, have used plasic for ring mains round building ,, think it was made by john guest ?? someoe will know and correct me

 

[Lincs Lass]

dont forget to put a low point with tap to drain water,,, have used plasic for ring mains round building ,, think it was made by john guest ?? someoe will know and correct me

The tank has a drain tap which I leave open between uses

 

[spanners and hammers]

it pays to fit one further down the line if it a long run ,, air warm at compressor gets colder further it gets away and the moisture condense back out

 

[TheTallGuy]

Usual trick is to put a slight fall towards the end of the run and fit a drain or water trap as there will be condensation in the pipe. If you are fitting multiple outlets then putting a drain at each outlet is advisable too. Every few months you should also run some antibacterial fluid through to ensure that Leigonella is not lurking around.

 

[Alan88]

Good thread. Got a new compressor for the parlour so wanted to set the old one up in a shed but wasn't sure what pipe work would be best.

 

[Servac]

Seen a few farms using mdpe water pipe as airlines. I think plasson fittings are rated to 16 bar and the pipe is to 12 bar.

 

[David.]

Had some blue 20mm up for 10 yrs been fine.
If you are going to use MDPE it should be the UV stable black variety for above ground.

 

[joe soapy]

dont use the had plastic pipe, it can shatter into sharp shrapnel.
the water pipe just stretches and splits if it fails

 

[agrotron]

Do you use normal water pipe fittings or special ones. Sounds a good plan to do my workshop with.

 

[Lincs Lass]

Ive found loads of pipe with the compression olives on the pipe that have the adapters to fit 1/2 inch metal ,,,the reducers from 1/2 to 1/4 bsp can be bought anywhere

 

[Servac]

Normal ones

 

[clunk]

I've been using blue plastic water pipe in my workshop for air line for past 4 years without any problems just fit the fitting for taps on the wall and screw in a fitting reducer down to the air fitting size you need its great