I don't understand your question.. I presented two alternatives,
"1" and '2" and somehow you converted that to
1 inch pipe...... I don't think that "1", a waterpipe strung
overhead is practical, or "2" ,a waterpipe above ground on a
fence rail either, because of freezing in winter.....
I am using 3/4 inch pipe for my buried run.....probably
PEX, now that you and others have pointed out the
ease of installation...
I'll probably just get a piece, cut it to length, and go
to a local plumber to crimp a PEX to female copper on
each end, and lay it in the hole....
It ain't rocket surgery.......
I always use regular PVC for buried water lines. You only need CPVC for
hot water lines.
I like PVC because it is inexpensive, doesn't require any special tools to
install, and is available just about everywhere. PVC is used underground
for sprinkler systems all the time, so it works well when buried.
Around here I would avoid putting copper (or any metal for that matter)
underground. Our soil is rather acidic and could potentially cause
corrosion or pitting in metal pipe.
I use 1" pipe for buried lines, 3/4" for main runs inside buildings, and
1/2" for individual fixture lines.
One foot deep should be fine for a water line if you don't have frost lines
to worry about. That's deeper than most tillers dig, and a single shovel
scoop won't usually go that deep either. If possible, I would try to route
it where you are unlikely to want to plant something in the future.
As for electrical, I think code depth is 24" unless you put it in conduit.
I think you're still supposed to go 18" with conduit, but you can run
conduit above ground according to code, so shallower depth's should be
fine. I would still aim for 24" unless you have rock or something you can't
get below. If the conduit is open on each end, make sure to install
bushings on each end to prevent the conduit from nicking the cable as it
expands and contracts, or shifts with earth movement. Lay the cable a
little loose too for the same reasons.
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