[amakarevic]

is it OK to bury galvanized steel pipe ? running water supply from my house to a detached shed. i know about soft copper pipe but i have reasons not to use it (primarily $ but others too).

 

[Mike Swearingen]

Galvanized steel pipe is obsolete. It will rust and corrode inside until it eventually plugs up over time.
Why don't you just use Schedule 40 PVC (3/4" or 1"). It's much easier to install with a hacksaw and PVC solvent and glue, and you should never need to replace it. Bury it below your frost line as you do any water lines. (PVC is for cold water only.)
Good Luck!
Mike

 

[amakarevic]

good idea. is schedule 40 PVC the same as CPVC. CPVC is what is legal in my municipality.

 

[Mike Swearingen]

No, Schedule 40 PVC (has to do with pipe wall thickness) is just what is used for pressurized water line vs. thin-walled PVC drains.
CPVC is also a plastic water pipe which also can be used for hot water or cold water, and is just as easy to install. If you're just running a cold water line, I would use PVC, if allowed locally. If you're running both hot and cold lines, then go with the CPVC. (PVC and CPVC are two different types of plastic.)
Good Luck! Use only the solvent or glue specified for the particular type of pipe that you choose.
Mike

 

[amakarevic]

one more question: the shed will have a frost spigot or whatever you call that thing that opens and closes below grade so that it does not freeze. that has a threaded galvanized end. do they have (C)PVC/galvanized adapters kind of like dialectric unions between copper and galvanized ? i am pretty sure they do but just making sure.

 

[Scuba_Dave]

I wouldn't bury CPVC - very thin-walled

 

[Brik]

one more question: the shed will have a frost spigot or whatever you call that thing that opens and closes below grade so that it does not freeze. that has a threaded galvanized end. do they have (C)PVC/galvanized adapters kind of like dialectric unions between copper and galvanized ? i am pretty sure they do but just making sure.

There are NPT to PVC adapters. They are all PVC with male or female threads in 1/2", 3/4" and 1". A little teflon tape or compatible pipe dope and you are all set.