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Monday, August 18th 2003, 2:22pm
Hey,
What i would do....is purchase a 1" double check valve either Watts or Febco from Sprinkler warehouse. Depending on wether your pressure and gpm is high....i would tap in and install a bullhead tee (3/4" x 3/4" x 1") and transfer to 1" right at the connection.....just to be sure that you have adaquet flow and pressure. If you do not wish to convert to the 1" pipe at the tap...then you can tap into the pipe with a 3/4" tee, and run the 3/4 to the backflow, still using a 1" BF device. At the end of the 3/4" tap install a 3/4" x 1" male adapter....and after the backflow device stay with 1" pipe... You should install the backflow relativly closest to the tap if you are using a double check (inside, and if you change your mind and use a PVB, that must be installed outside the home...After the backflow device i recommend using copper or PVC (one or the other) to head to the valves....remember to install a tee and cap it off with a threaded cap....so you can winterize your system....(the most common way when using a DC is to run copper outside and install a heel tee which has the threads on the leg...so the cap points up...and run the line to the valves(if you use copper after the DC) ..... anyway...definatly use a 1" Double Check [
]
What i would do....is purchase a 1" double check valve either Watts or Febco from Sprinkler warehouse. Depending on wether your pressure and gpm is high....i would tap in and install a bullhead tee (3/4" x 3/4" x 1") and transfer to 1" right at the connection.....just to be sure that you have adaquet flow and pressure. If you do not wish to convert to the 1" pipe at the tap...then you can tap into the pipe with a 3/4" tee, and run the 3/4 to the backflow, still using a 1" BF device. At the end of the 3/4" tap install a 3/4" x 1" male adapter....and after the backflow device stay with 1" pipe... You should install the backflow relativly closest to the tap if you are using a double check (inside, and if you change your mind and use a PVB, that must be installed outside the home...After the backflow device i recommend using copper or PVC (one or the other) to head to the valves....remember to install a tee and cap it off with a threaded cap....so you can winterize your system....(the most common way when using a DC is to run copper outside and install a heel tee which has the threads on the leg...so the cap points up...and run the line to the valves(if you use copper after the DC) ..... anyway...definatly use a 1" Double Check [
]
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers
Ray
Rays Above and Beyond Automatic Lawn Sprinklers
Tuesday, August 19th 2003, 12:23pm
Craigwagner6,
I recommend the double check valve assembly since your local building code requires it.
See Local Code Lingo Topic:
http://www.sprinklertalk.com/forum/topic.asp?TOPIC_ID=386
Both the PVB and DCA typically lose about 5 psi through the device. The DCA will lose a litle more than the PVB, but not enough to make your decision based on pressure loss through both devices.
[
]
I recommend the double check valve assembly since your local building code requires it.
See Local Code Lingo Topic:
http://www.sprinklertalk.com/forum/topic.asp?TOPIC_ID=386
Both the PVB and DCA typically lose about 5 psi through the device. The DCA will lose a litle more than the PVB, but not enough to make your decision based on pressure loss through both devices.
[
]
Steve
SprinklerTalk
SprinklerTalk
Tuesday, August 19th 2003, 1:43pm
Hey,
Definatly use the Double Check valve! The PVB must be installed 12-18 inches above ground and outside, while you can place the double check inside right after your tap! Changing over to PVC to the valves will be much eaiser. Definatly use the Irritrol 2400T valve for the inline valve. ......... Either choose a Febco or a Watts backflow! []
Definatly use the Double Check valve! The PVB must be installed 12-18 inches above ground and outside, while you can place the double check inside right after your tap! Changing over to PVC to the valves will be much eaiser. Definatly use the Irritrol 2400T valve for the inline valve. ......... Either choose a Febco or a Watts backflow! [
]
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers
Ray
Rays Above and Beyond Automatic Lawn Sprinklers