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The last 5 posts

Thursday, May 22nd 2003, 4:47am

by Rays Sprinklers

Oh,,,, you can do that too........In my area the mainline is in the ground because we dont have basemens. Thats why i suggested in a garden, because you wouldnt want that up on your lawn.

Rays Above and Beyond Automatic Lawn Sprinklers

Saturday, May 17th 2003, 5:05pm


<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>Remember to put the PVB in a garden <hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

Install your PVB right when the mainline comes out of the house, not in the garden where it could get damaged by shovels and tillers in the garden.

The following picture is how I install my PVB's:
<img src="" border=0>

Edited by - RVLI on May 17 2003 10:06:46 PM

Saturday, May 17th 2003, 2:20pm

by Rays Sprinklers

I would use 1" (much better) after the backflow use PVC (schedule 40) right to your control valves. Remember to put the PVB in a garden out of the way 12" above ground and OUTSIDE. The Double checks can go in the ground or inside.

Rays Above and Beyond Automatic Lawn Sprinklers

Tuesday, March 19th 2002, 11:12am


I have fixed many backflow devices that are too small in pipe size. I would use 1" copper from your copper mainline up to your backflow device, then use PVC pipe for your sprinkler mainline. Do not use poly for your mainline. It cannot withstand the constant pressure that mainlines hold. Hope this helps and good luck!!

Sunday, March 17th 2002, 8:16am

by chpsk8

3/4" or 1" Backflow

I am curious if I can use a 3/4" backflow on my system or should I use a 1". I am tapping in right after the meter in my house (3/4"). My thought was to use 3/4" copper to span the 17' to the outside of my house, then either convert to 1" copper and install a 1" Febco, or keep the 3/4" copper and go to a 3/4" backflow, then out of the backflow size up to my 1" poly main line. What are the pros and cons of 1" backflow vs. 3/4. I want to go the best route possible, both economical and performance.