SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

The design for the back is fine. The front will be ok, too. It is ok that they throw 30 feet, because the area that one side didn't cover, the other side will cover for it. Both side will do that so there is no worry there. Also, the I-20's will throw 40'.

All of this is assuming you have an adequate water source and not a 1/2 inch copper line right?

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Hey,
Waittttttt!!!!!!!! Poly is not to be used for the mainline (leading to valves) it will pop under constant pressure, there you need to use copper or PVC, and poly to the sprinklers
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Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers

If you had a master valve coming out of the house then would it be okay to used poly to the valves?

Nope. You still consider the valves after your master valve on the mainline, so it still needs to be PVC or Copper. No Exception!

<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
Hey,
Waittttttt!!!!!!!! Poly is not to be used for the mainline (leading to valves) it will pop under constant pressure, there you need to use copper or PVC, and poly to the sprinklers
<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

Are you saying that EVERYTHING before the valves (not the breaker, but the valves) needs to be copper or PVC? I TOTALLY disagree.

My mainline is a 300' piece of 1.25" 100psi poly buried in a horseshoe around my house. There's a 30 foot piece that runs from my vaccumn breaker to feed the mainline. About every 30 feet (on my poly mainline) is a 1.25 slip x 1.25 slip x 1" FPT that connects to a 1" jar-top valve (slips are double clamped on every connection). From the valves, I run 1" 100PSI poly to the heads.

I'm on a well with a 20 gpm 3/4 hp pump, which runs (average) 50 psi -- a 40 psi cut-on and a 60 psi cut-off switch settings.

I have NO manifolds built. Which means I used much less 1" poly (less pressure loss versus the 1.25" main to valves, less $$ wasted in 1" poly).

95% of the residential systems installed around here (MI) are designed and built this way -- IF the builder is any good.

Why, again, should I run copper or PVC instead of 100PSI 1.25" poly (330 feet worth)? There's no need.

True but around here we have about 85-105 PSI and eventually the lines can pop, or give out.........if there is a master valve than its okay, but i wouldnt use poly for the mainline..........just my way of doing things.....Poly isnt designed for constant water pressure

Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers

We also put our valves in a grouped manifold either in the front or back, so there is not much of a length (no more than 20')and the lines run out of there!

Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers