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Monday, October 2nd 2017, 6:34pm

Author: Tim57

What size main service line?

A couple few more questions: 1. Regarding the subject of anti-siphon valves requiring to be 12" higher than the sprinkler heads. Do you measure this elevation difference from the ground level of the sprinkler head or the elevation they're at when in operation i.e., the pop-up sprinkler heads. 2. If I'm using the Irritrol 2713APR, can I go with the bottom of the line Rain Bird 5000 heads since I can adjust the pressure of the entire zone at the 2713? I don't think I'll benefit from the added feat...

Friday, September 29th 2017, 5:29pm

Author: Tim57

What size main service line?

A couple few more questions: 1. Regarding the subject of anti-siphon valves requiring to be 12" higher than the sprinkler heads. Do you measure this elevation difference from the ground level of the sprinkler head or the elevation they're at when in operation i.e., the pop-up sprinkler heads. 2. If I'm using the Irritrol 2713APR, can I go with the bottom of the line Rain Bird 5000 heads since I can adjust the pressure of the entire zone at the 2713? I don't think I'll benefit from the added feat...

Thursday, September 28th 2017, 11:08am

Author: Tim57

What size main service line?

The pipes would be sticking out of either flower beds or small landscaping rocks but not grass. I'm still thinking about how to disguise the white pvc as a couple of the pipes will be 24 inches tall. I thought maybe wrapping the pipes with black electricians tape would help conceal them against the black chain link fencing. I don't know what else I can do given my topography and the need to locate the anti-siphon valves 12 inches above the sprinkler heads and avoiding the underground back flow v...

Monday, September 25th 2017, 11:57am

Author: Tim57

What size main service line?

Remember, my irrigation mainline comes right off the "T" at the meter. The other side goes to the house. I was referring to the water between the ball-valve controlling the flow from the meter to the zone control valves. I wasn't planning to have a manifold. I was planning to run my 1-1/4" mainline from the meter (located on the NE corner of the lot) along the northern (highest elevation) property line tapping into it with 1" (2713APR) zone control valve elevated at least 12" above the highest s...

Saturday, September 23rd 2017, 6:43pm

Author: Tim57

What size main service line?

Okay, a couple more questions: 1. With a static 86psi coming off the meter, do I need a pressure regulator valve? It seems to me that I'm coming off the 1-1/4" mainline with a 1" pipe to my zone valve. If the 2713 APR will handle the pressure at this point then I can always adjust the valve as needed for each zone. Your thoughts? 2. What happens with the water left in the mainline after the winter? It seems that this water could be siphoned into the house supply line when the mainline is opened ...

Thursday, September 21st 2017, 12:18pm

Author: Tim57

What size main service line?

Thanks again for your patience. I'm still a little confused about whether I should come off my 5/8" meter with 1" or 1-1/4" pipe. I'm willing to go as large as needed to provide the greatest capacity possible with the 5/8" meter. I guess my question is, if my 5/8" meter at static 86psi is pushing 19gpm through a 3/4" brass pipe at the meter, is the larger 1-1/4" really going to make a difference at the zone pressure and volume? If you say 1" from the meter through the valves and all the way to t...

Wednesday, September 20th 2017, 10:37am

Author: Tim57

What size main service line?

Thank you....I think I got it. Now, just a couple more questions: 1. The 2014 design Rain Bird provided me calls for 1-1/4" Sch. 40 pipe. Is there a push away from 1-1/4" to 1" pipe? My local Home Depot lists the 1-1/4" as WDV pipe. 2. What brand of valves and sprinkler heads do you recommend? Thanks again.

Monday, September 18th 2017, 1:01pm

Author: Tim57

What size main service line?

I'm on a flat to gentle slope from the meter downhill across the entire landscape. Could I safely install the individual anti-siphon valves in a single box at what would be the same elevation as the nearby meter and the highest point on the landscape? This would center the valve box between the meter and the controller thereby reducing the wire run to a single conduit. Of course some nearby sprinkler heads would be at the same or even slightly higher than their control valve given the valves wou...

Sunday, September 17th 2017, 6:19pm

Author: Tim57

What size main service line?

The more I read the more confusing this gets so I will try to keep this short and to the point. Washington State specifies a RPBA for high risk systems and a DCVA or PVBA for low risk systems. Because I am safety conscious and I may add an auxiliary water supply (well) later on how does this sound to you: Install a 1" RPBA above ground to keep the relief valve from becoming submerged and in an insulated enclosure to provide freeze protection. The drawing shows an Air Gap after the RPBA and I'm n...

Saturday, September 16th 2017, 11:42am

Author: Tim57

What size main service line?

The local water company requires back flow prevention but they don't specify a type. I want to error on the side of safety so I am looking at a double check valve assembly or reduced pressure zone assembly. The two problems I'm having in selecting one is: 1. They're expensive and that's why I'm trying to pinpoint the right size supply line. My Rain Bird design specified 1-1/4" but of course -- the larger the back flow device, the larger the cost. If a 1" will work with my 86 psi / 19 gpm and < 1...

Wednesday, September 13th 2017, 11:33am

Author: Tim57

What size main service line?

I have about a 1/4 acre requiring irrigation. The 86 psi was measured at the water meter with no flow. My soil type is type 4 - sandy loam. I'm just trying to determine the correct size of the main supply line from the meter to the irrigation system. I want to get the supply line in this fall and begin with the system in the spring. I just don't want to install a too small or too large supply line, backflow preventer, shut offs, etc. only to find later it wasn't right. I'll be updating my profil...

Tuesday, September 12th 2017, 12:23pm

Author: Tim57

What size main service line?

Thank you for your reply. I know your time is valuable and I certainly appreciate it. Could briefly explain the pressure/volume changes from the 5/8" meter at 86psi / 19 gpm, going a level 50' to the control valves via one inch pipe. Thanks again.

Monday, September 11th 2017, 12:00pm

Author: Tim57

What size main service line?

I am new to the forum....please bare with me and correct me when needed. I have a 5/8" meter with a 3/4" brass pipe out with a 3/4" "T" fitting and a 1-1/4" poly pipe going to the house. Pressure at the meter is 86 PSI with 19 GPM. What size should I use from the 3/4" T to the back flow assembly and control valves. I believe I may need to reduce the pressure closer to 75 PSI so there may also be a PRV somewhere along the line. I was thinking that the 5/8" meter would significantly hamper my syst...