No MV control with Hunter X-Core controller

[jcom]

Yep, half the zones are in a remote area and served by 1" poly and the reason I don't want pressure until controller opens valve. Half zones are close to the house and served by PVC.

John

[1idejim]

Originally Posted by jcom

Yep, half the zones are in a remote area and served by 1" poly and the reason I don't want pressure until controller opens valve. Half zones are close to the house and served by PVC.

John

that makes sense to me now.
Posted via Mobile Device

[Wet_Boots]

To some degree you are trusting that the valves you installed are always going to open when you want them to, but this is true of a lot of poly mainline installs.

[AI Inc]

Originally Posted by 1idejim

that makes sense to me now.
Posted via Mobile Device

Dosnt to me, no need to use a MV just cause of polly.

[Wet_Boots]

Originally Posted by AI Inc

Dosnt to me, no need to use a MV just cause of polly.

I'd rather install the master valve than to trust otherwise-reliable utility-grade poly with 24/7 street pressure.

[jcom]

Precisely Badger Man

[CAPT Stream Rotar]

make your polly fittings right, know your working pressure...

we have hundreds of poly mains with no MV...no leaks yet.

[Wet_Boots]

When the pressure is 24/7, things can change. Water hammer from closing zone valves is reason enough for a master valve upstream of poly mains, but there is something further that may only happen with some tubing, when the pressure is 24/7. I use mostly Oil Creek and Charter brands of non-NSF 100-psi tubing, which is the modern high-density material and all-virgin poly resin, (even though utility-grade poly tubing, by its not being NSF-rated, could contain remelted material)

If I do have a poly mainline under 24/7 pressure, like when there are hose bibs tied in, that mainline will only be NSF-rated tubing, at a pressure rating well beyond the static pressure in the system. No worries so far. On a master-valve-fed poly mainline, I can use the ordinary utility-grade poly, and probably save more on the mainline poly than the cost of the master valve.

[Mdirrigation]

Every system we install gets a master valve , and we use all pvc . Why ? We put in a quality system , a master valve is part of that quality . We have city water pressure as high as 135 psi in some areas. ( my house is 125 before the regulator , my hose spicot is before the regulator its great) . I fix leaking poly mains weekly , I always advise that a MV be added . Or I will be back again .