What size pipe for spigot running Sprinklers?

[mcintoshmc]

So, I have 1 inch coming in. I'm going to reduce to 3/4 to the water heater, and then run 3/4 throughout, but reduce 1/2 to the fixtures except for the h/c in shower, I'll keep that 3/4.

What I'm not sure of, is my sprinkler system in the back is fed from the spigot. I have nothing but long distance rotor heads. I have two zones, and 11 heads. Not sure, what size I should run to the spigot, so that I won't affect water pressure in the home while running.

 

[IFIXH20]

If you are doing a repipe , it may be a good time to move the sprinkler system to the water service , but if you want to keep it at the spigot I would run a 3/4'' line to it. Hope you have a backflow preventer.

 

[mcintoshmc]

I have anti siphon valves.

 

[mcintoshmc]

So, if I connect sprinklers to water line, that doesn't affect pressure after the regulator?

 

[johnjh2o]

I have anti siphon valves.

Not good enough, this is what is needed.
http://www.watts.com/pages/_products_details.asp?pid=3462

John

 

[mcintoshmc]

are you saying that I should have that if I tap into the water supply vs. running from the spigot? or you're saying that I should have that period?

 

[johnjh2o]

It needs to be connected between the hose bibb and your heads. It must also be installed 12" above your highest head. It may also have to be tested yearly by a certified backflow tester.

John

 

[IFIXH20]

If the sprinkler system is connected to the hose bibb or water service you should have a backflow preventer. I would connect the sprinkler to the water service so you can turn off the water to the house when you go on vacation. I always turn off the water to my home and the breaker to the water heater when we go on vacation -