Long water line

I ran mine in 1 1/4" plastic roll pipe.....

put about 4" sand in the ditch ....cover it with another 4" of sand.....pusd the dirt back....remove any rocks....been OK for last 27 years..... Don S.W. Ohio

I had the same concerns about adequate flow/pressure when we ran water from our house to the barn, which is about 270 feet.

After calculating friction loss, we opted for 1-1/4" heavy wall (160 psi rated) coiled well plastic, with all brass insert fittings and Ideal stainless clamps. It works great with no noticeable pressure loss.

You can get 160 psi well plastic in 300 foot coils at any good plumbing supply house. Be sure to use brass fittings on any part that is buried and double clamp each insert connection.

This should give you all the water you will need at a small fraction of the cost of copper.

Good luck,
Scott

• Sunset Hollow Farm

Mahalo,
doogdoog

If I remember my numbers correctly, 1" is 4 times larger than 1/2" and twice the size of 3/4 inch. That being said, don"t worry about friction loss.

Where I live, all water supplies need to be 1 - 1.25" copper with no joints along the way.

Whatever you do, don't skimp on the diameter. 250 feet is a long run for even 1 inch pipe. How big is "big enough" is hard to say; you want as big of pipe as your water meter tap can supply, but I have no idea what that would be. 1-1/2 PVC sounds good to me; you know your flow rate will be at least as good as what you have now.

The size of the outlets in your house is irrelevant. Water loses pressure flowing through a pipe over distance. 1-1/4" pipe will have about half the pressure drop of one inch pipe, while 1-1/2 inch pipe will have about half the pressure drup of 1-1/4. How much that pressure drop will be depends on the maximum flow rate, which is dependent on your water main tap.

YMMV!