I would like to run a air line from my utility room in the basement out to the attached garage. This requires passing through a concrete wall and going about 15 feet underground to where the pipe would stub up, the floor is not yet poured. What would be the best material, and code compliant material for this application?
Underground Air Lines
- Thread starter 50cal
- Start date
HoosierBuddy
Well-known member
I would use high density polyethylene gas line for the underground portion and black steel pipe for the above ground portion. You'll have to paint any exposed steel to keep it from rusting.
The high density gas piping is only rated for 100 PSI. Normally, I'd be a real stickler on not exceeding that...but I really don't think it would be a problem to run it up to 120 PSI or so on air.
Your other choice might be to do the whole thing in galvanized. It would last a long time...but not forever.
Phil
The high density gas piping is only rated for 100 PSI. Normally, I'd be a real stickler on not exceeding that...but I really don't think it would be a problem to run it up to 120 PSI or so on air.
Your other choice might be to do the whole thing in galvanized. It would last a long time...but not forever.
Phil
Last edited:
cderalow
Well-known member
run a standard 3/4" black iron or copper in a 2" pvc conduit.
protection and lack of exposure to dirt underground. strength and durability of iron or copper.
add to that if you put a trap & filter at the house side, if you slope the line upward towards the garage, you'll significantly reduce condensation at the tool end.
protection and lack of exposure to dirt underground. strength and durability of iron or copper.
add to that if you put a trap & filter at the house side, if you slope the line upward towards the garage, you'll significantly reduce condensation at the tool end.
StaggeringGoat
Well-known member
I'd use PEX. It's rated for the pressure and can be direct burried.
Steevo
Well-known member
There you go.
Three responses, three different answers.
GJ at its best!
Just wait, there are lots more options/suggestions to come . . .
Three responses, three different answers.
GJ at its best!
Just wait, there are lots more options/suggestions to come . . .
ishiboo
Well-known member
Actually two people said HDPE. PEX and PE gas line are basically the same thing, perhaps some minor composition changes
I would use another form of PEX - the PEX-AL-PEX which is rated for the pressure.
6768rogues
Banned
If using a flexible tube, I would sleeve it in something rigid and pitch it back to the house. Then condensation can be drained in your basement. Dips in a flexible line underground could be problematic.
buzz4041
Well-known member
Galvanized pipe with a layer of dope wrap on it for corrosion along all parts in contact with the ground. It will last forever nearly.
A century ago, when my house was built, they used galvanized (at least I think it was galvanized) pipe for the water supply from the city mains. Those mains have since been replaced twice, and my supply lines failed at 98 years. I am not 100% sure the supply line was galvanized; it might have been just black pipe; in which case its longevity is even more surprising.
Terry
Terry
Your links didnt work for me. Thanks for all the great responses!
http://www.garagejournal.com/forum/showthread.php?t=109062
http://www.garagejournal.com/forum/showthread.php?t=110385
Try these.
lg
no neat sig line
http://www.garagejournal.com/forum/showthread.php?t=110385
Try these.
lg
no neat sig line