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grey

Advanced Member

Posts: 90

Location: Eastern WA

1

Tuesday, June 28th 2011, 12:33am

Is using poly for mainline ok?

I just read in 2 sources that it's not advisable to use poly for mainlines. What does industry say? We have freezing winters. I was thinking that using 160 PSI rated poly pipe in 60 PSI static circuit would be fine.

Wet_Boots

Supreme Member

Posts: 3,871

Location: Metro NYC

2

Tuesday, June 28th 2011, 8:23am

You are still winterizing the mainline, regardless of material. 160 psi poly is fine for your use.

Mitchgo

Supreme Member

Posts: 502

Location: Seattle

3

Friday, July 1st 2011, 1:46am

People are intimated with products they don't know about too well.

we use 200 psi poly for our main lines and 100 psi poly for our laterals. Superlon is the best quality poly out there in my opinion

Wet_Boots

Supreme Member

Posts: 3,871

Location: Metro NYC

4

Friday, July 1st 2011, 7:31am

If the mainline isn't pressurized 24/7, it only has to have a pressure rating above the static pressure of the system. I see no performance issues with systems that use 100 psi for a non-pressurized mainline so long as the static pressure is less than 100 psi.

Mitchgo

Supreme Member

Posts: 502

Location: Seattle

5

Friday, July 1st 2011, 9:28am

100 psi in my opinion is like using class 200. The pipe will be nicked with a blow to the shovel if someone was digging

vs the 200 .. you can take an axe to that thing and not cut it ( not really but you know what i mean)

grey

Advanced Member

Posts: 90

Location: Eastern WA

6

Friday, July 1st 2011, 11:05am

it will be under pressure 24/7 except for winter.

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