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View Full Version : Valves in one box versus spread throughout lawn


J&JLawncare1988
10-30-2011, 09:06 PM
Hey guys,

I have been doing quite a bit of research on irrigation, as I am looking to start offering the service one of these days. My question is, why do some systems have all of the valves in one manifold, in one valve box, running out to their individual zones, and other systems have valves spread throughout the lawn. Wouldn't the single valve box be much easier in the aspect that you wouldn't have to run wires all over the place, but instead, just from the main valve box to the controller. Someone please clear this up for me, because I have been trying to figure it out for a while.

Wet_Boots
10-30-2011, 09:12 PM
If you install with PVC pipe, laid in open trenches, the custom is to minimize the trenching. That leads to the decentralized designs, and wires laid in the trenches along with the pipe.

If you pull poly pipe instead, manifolds make much more sense.

J&JLawncare1988
10-30-2011, 09:19 PM
If you install with PVC pipe, laid in open trenches, the custom is to minimize the trenching. That leads to the decentralized designs, and wires laid in the trenches along with the pipe.

If you pull poly pipe instead, manifolds make much more sense.



See that's the thing, here in Missouri, guys are definitely pulling poly pipe, so I would assume that they just tuck the wire into the narrow slit from the blade and run it back to the controller. And also, why do some guys bury the valves in the dirt with no access box? I would think that you would want the valves easy to locate and access.

DanaMac
10-30-2011, 09:31 PM
And also, why do some guys bury the valves in the dirt with no access box?

Because some guys are just idiots. They do it for a few reasons. Save money on boxes, don't know any better, or it makes them look like they know what they are doing when they are called back to fix the valve and they know right were it is even though there is no box. But for the most part, they are just idiots.

J&JLawncare1988
10-30-2011, 09:38 PM
Because some guys are just idiots. They do it for a few reasons. Save money on boxes, don't know any better, or it makes them look like they know what they are doing when they are called back to fix the valve and they know right were it is even though there is no box. But for the most part, they are just idiots.

Haha, that answers my question. I didn't think there was an advantage to burying the valves in dirt.

DanaMac
10-30-2011, 09:41 PM
I could see it being an advantage on a baseball or football field, but there are still better options than just burying it.

Mike Leary
10-30-2011, 09:52 PM
It's called "direct buried" and in the day of as-builts, brass valves and bullet-proof solenoids, there was no particular reason for valve boxes; you'd be dead before a service call was needed. These days, I'd prolly spot a single valve in a jumbo just to keep track of it, 'cause I know I'll be back for some damn reason.:hammerhead:

DanaMac
10-30-2011, 10:04 PM
It's called "direct buried" and in the day of as-builts, brass valves and bullet-proof solenoids, there was no particular reason for valve boxes; you'd be dead before a service call was needed

Unfortunately, there was one company in town that did this many moons ago, and they used brass WM valves. Now I get to find and dig up as needed.

Wet_Boots
10-30-2011, 10:10 PM
I still occasionally hunt up a single brass valve, usually an Imperial, and it will have some plastic sheeting over it. (and solenoid connections wrapped with electrical tape)

irrig8r
10-30-2011, 10:10 PM
What's really fun is when you encounter a site with an old hydraulic system that's been abandoned but never disconnected, and the valves are buried somewhere in the landscape w/o boxes (but not deep), and you get one of those rare freezes (for our area) and a valve cracks and water starts flowing out sprinklers the customer didn't even know he had because the system was installed two owners ago.

Mike Leary
10-30-2011, 10:19 PM
What's really fun is when you encounter a site with an old hydraulic system that's been abandoned but never disconnected, and the valves are buried somewhere in the landscape w/o boxes (but not deep), and you get one of those rare freezes (for our area) and a valve cracks and water starts flowing out sprinklers the customer didn't even know he had because the system was installed two owners ago.

:laugh::laugh::laugh: I looked at one of those and was prepared to try and troubleshoot it. The client said, "I've had it screwing around with this system my parents installed thirty years ago, replace it." I did and then fifteen years later, expanded it for the kids that took over. Still a client. :clapping:

FIMCO-MEISTER
10-30-2011, 11:30 PM
How about the oldies but goodies in which the manifolded the solenoids and ran 3/8" CU tube to the buried valve.

FIMCO-MEISTER
10-30-2011, 11:31 PM
If you install with PVC pipe, laid in open trenches, the custom is to minimize the trenching. That leads to the decentralized designs, and wires laid in the trenches along with the pipe.

If you pull poly pipe instead, manifolds make much more sense.

Best short explanation ever on this topic.

AI Inc
10-31-2011, 06:13 AM
If you install with PVC pipe, laid in open trenches, the custom is to minimize the trenching. That leads to the decentralized designs, and wires laid in the trenches along with the pipe.

If you pull poly pipe instead, manifolds make much more sense.

explained to a tee , well done mr boots.

Wet_Boots
10-31-2011, 08:50 AM
What is always a surprise to me, is a (very old) system done with poly and a manifold, and open trenches, which can be the only way to explain why the pipes don't take the usual routes.

Kiril
10-31-2011, 10:11 AM
If you install with PVC pipe, laid in open trenches, the custom is to minimize the trenching. That leads to the decentralized designs, and wires laid in the trenches along with the pipe.

PVC and manifolds out here with minimal trenching. Bigger main trenches .... yes, if you want to leave room between your pipes.

Mdirrigation
10-31-2011, 09:02 PM
If you install with PVC pipe, laid in open trenches, the custom is to minimize the trenching. That leads to the decentralized designs, and wires laid in the trenches along with the pipe.

If you pull poly pipe instead, manifolds make much more sense.


Just to clarify things , both poly and pvc can be pulled in . Manifolds or single boxes are a matter of choice and design , depending on the layout you can do one or the other or a combination of both . Wire can be pulled along with the pipe no problem .

DanaMac
10-31-2011, 09:10 PM
I prefer manifolds. But on bigger systems, I like to see a mainline and multiple manifolds. On a 12 zone system, maybe three areas with four valves each. Or four areas with 3 valves each.

Mike Leary
10-31-2011, 09:59 PM
I prefer manifolds. But on bigger systems, I like to see a mainline and multiple manifolds. On a 12 zone system, maybe three areas with four valves each. Or four areas with 3 valves each.

Yup, a three valve manifold works great in a 12" standard. If you're good, you'll cram an isolation valve in there, too.