You are not logged in.

Reply

Dear visitor, welcome to SPRINKLER TALK FORUM - You Got Questions, We've Got Answers. If this is your first visit here, please read the Help. It explains how this page works. You must be registered before you can use all the page's features. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.

Attention: The last reply to this post was 1046 days ago. The thread may already be out of date. Please consider creating a new thread.

Message information
Message
Settings
Automatically converts internet addresses into links by adding [url] and [/url] around them.
Smiley code in your message such as :) is automatically displayed as image.
You can use BBCode to format your message, if this option is enabled.
Security measure

Please enter the letters that are shown in the picture below (without spaces, and upper or lower case can be used).

The last 10 posts

Friday, October 2nd 2015, 11:13pm

by aerodan1

One of the wiring runs ended up about 100 feet, maybe a little longer, but the rest were shorter. The guys who pulled the pipe for me worked with me to minimize any crossovers; as it was, they ended up hitting the existing poly on two pulls, so had to redo a few pulls and also some hand digging on a few crossovers where the pipe was at or near the surface. Definitely saw your point about avoiding crossovers firsthand! Thanks
I bought 500 ft. of 18-7 wire, will just use that for the whole yard, should be more than enough.
Since you definitely have more than enough wire, you gain flexibility in valve locations. One factor not yet mentioned here is distance between manifolds, as it affects wire that is pulled. You can benefit by keeping any such spacing less than a hundred feet. Any flexible wire or pipe is slightly stressed by pulling with a plow, and the longer the pull, the greater the stress. A valve box gives you space to leave some slack in the chain of wiring.

Sunday, September 27th 2015, 10:11am

by Wet_Boots

I bought 500 ft. of 18-7 wire, will just use that for the whole yard, should be more than enough.
Since you definitely have more than enough wire, you gain flexibility in valve locations. One factor not yet mentioned here is distance between manifolds, as it affects wire that is pulled. You can benefit by keeping any such spacing less than a hundred feet. Any flexible wire or pipe is slightly stressed by pulling with a plow, and the longer the pull, the greater the stress. A valve box gives you space to leave some slack in the chain of wiring.

Sunday, September 20th 2015, 11:15am

by Wet_Boots

Avoiding crossovers sometimes means hand-digging a crossover pipe, so the mainline will run on a path where any hand-dug crossover point is near a head or a junction where you would be digging anyway.

Saturday, September 19th 2015, 7:21pm

by aerodan1

I bought 500 ft. of 18-7 wire, will just use that for the whole yard, should be more than enough.

Thursday, September 17th 2015, 9:40pm

by Wet_Boots

Try a freehand design. Mark and identify the heads. Then draw in the zone piping freehand, in away where you try to never cross the mainline. Remember that the electrical cable is more expensive than the poly pipe, so you can use more poly if it saves on wire.

Thursday, September 17th 2015, 8:58pm

by aerodan1

Thank you for the response. The large vavle manifold upstream would just be two valves (7 and one drip zone). I also have moved various heads from one zone to another from the referenced design (and also took out a couple of extra heads that aren't needed). Right now there's only 3 heads on zone 6 totaling 6.5 gpm, I could move the half circle head at the bottom of the "blue" zone (zone 7) to zone 6 to avoid crossing the main running to zones 5/6 with the lateral on zone 7.

I figure I will still have to cross the lateral / main on zone 1 in two spots, zones 3 and 4 in one spot each, and then cross laterals in two spots for zones 8 / 9. I could run the mains at 12 inches and then laterals at 8 inches where they cross if this would work. Thanks

If you are pulling poly pipe, then the design is subject to radical change. Piping isn't laid out as per the diagram. The heads remain as is, but the dots connect differently. When you are pulling pipe, you don't do any crossovers unless there is no choice. You would also lose at least one valve location, zones 5 and 6, which join the large valve group upstream.

Thursday, September 17th 2015, 7:21pm

by Wet_Boots

If you are pulling poly pipe, then the design is subject to radical change. Piping isn't laid out as per the diagram. The heads remain as is, but the dots connect differently. When you are pulling pipe, you don't do any crossovers unless there is no choice. You would also lose at least one valve location, zones 5 and 6, which join the large valve group upstream.

Thursday, September 17th 2015, 6:28pm

by aerodan1

Got it, thanks!
You can attach the wire to the chain that holds the grip. I usually thread it through 2 or 3 links and then back upon itself.

Thursday, September 17th 2015, 6:27pm

by aerodan1

Thank you, I'll make sure to leave plenty of extra wire also.
Thank you for the follow up mrfixit, so if I run two 7 / 8 strands to the back / side yards, I don't need to run both together starting from the controller (or would I?). Also what is best way to attach the wire to the pipe if I'm pulling the pipe? Thanks,

Dan


Yes you'll need to start both strands at the controller.
I said earlier to plan on having an extra 10 feet of wire. Now that I've seen the layout I'd plan on having an extra 10 feet to each valve box. Maybe 15 or 20 to the back. One time I ran a 100 foot run of wire and I came up 2 feet short. It's really easy to do. Buy extra.
As far as attaching the wire to the pipe and pulling it, someone else will have to answer that.
I've never seen pipe pulled let alone attaching a wire to it. We use PVC pipe where I live.

Thursday, September 17th 2015, 7:43am

by SunCoLawns

You can attach the wire to the chain that holds the grip. I usually thread it through 2 or 3 links and then back upon itself.