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gensco

New Member

Posts: 2

Location: USA

1

Saturday, August 2nd 2003, 2:45pm

poly pipe vs pvc

I am going to be installing a inground system at my house and was wondering if there are pros and cons to poly pipe instead of pvc. Here are the facts. I have a yard that is 20 wide x 40 long and I have pressure of about 55 pretty constantly. I need to install 4 spray heads to complete the head to head part. I need to go in a "u" shape and I heard that with pvc an elbow represents the equivelant of 10 feet in friction and pressure. Any ideas would be appreciated, thank you.

Tim


drpete3

Supreme Member

Posts: 375

Location: USA

2

Monday, August 4th 2003, 4:18am

I like pvc for my main line( pvc prior to valves) and poly after. Poly is better in freezing climates.

Thanks,

Pete
Thanks,

Pete

Rays Sprinklers

Supreme Member

Posts: 493

Location: USA

3

Tuesday, August 5th 2003, 3:50pm

Definitly use the PVC for the line before the valves, and then poly fter. You can have a local irrigation contractor pull the poly which definatly makes the work eaiser



Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers

BTanner

Senior Member

Posts: 21

Location: USA

4

Wednesday, August 13th 2003, 12:06pm

Any idea who pulls poly pipe in the Rocky Mount, North Carolina area? Our winters are pretty mild in comparison to the North, but I would still like to entertain the thought of poly over PVC on laterials.


RVLI

Supreme Member

Posts: 460

Location: USA

5

Wednesday, August 13th 2003, 5:06pm

Btanner,
Can you get poly pipe there in North Carolina?

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Rock Valley Lawn & Irrigation

BTanner

Senior Member

Posts: 21

Location: USA

6

Thursday, August 14th 2003, 4:38am

Sure, if we're talking the black poly pipe like is used in many deep wells and as service water piping to homes. Generally comes in 100psi and 160psi pipe and comes in 100' and 500' rolls. We call it black roll pipe and it is manufactured by "Black Diamond".


Rays Sprinklers

Supreme Member

Posts: 493

Location: USA

7

Monday, September 1st 2003, 6:46am

thats right...you got it.....try to find a contractor to pull your lines... you will have to be home because you will have to tell him where to put the lines and the lcoation of all your heads
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers

bhungue2

Advanced Member

Posts: 70

Location: USA

8

Tuesday, September 30th 2003, 9:28am

Why use pvc for the main to the valves? Why not use black poly for the whole thing?
Bhungue2

Rays Sprinklers

Supreme Member

Posts: 493

Location: USA

9

Tuesday, September 30th 2003, 1:06pm

PVC is a rugged Thick pipe able to withstand pressure (constantly) poly pipe is very weak, and designed for use with the lines that have water running through for a certain amount of time. poly pipe will burst and the fittings will seperate under constand pressure.

Definatly do not use Poly before the vlaves or for the manifold (copper or pvc)[;)]
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers

RVLI

Supreme Member

Posts: 460

Location: USA

10

Tuesday, September 30th 2003, 5:51pm

Poly mainline only if you use a master valve. That's how I do it. If you use a PVB, make sure your master valve is AFTER the PVB otherwise having the valve before the PVB defeats the purpose of the PVB.

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