Register free!
Search
 
     

Click for Weather
Reply
 
Thread Tools Display Modes
  #1511  
Old 12-12-2012, 05:49 PM
Mike Leary's Avatar
Mike Leary Mike Leary is online now
LawnSite Fanatic
 
Join Date: Mar 2007
Location: Alpine, Arizona
Posts: 20,496
Quote:
Originally Posted by Wet_Boots View Post
bring on the flames
Let me the first: As long as an "assembly" not a "device" (which cannot be tested) is installed with proper clearance for testing and service (unions on both ends), I see no reason why a RP cannot be installed in a proper below-grade v.b., as long as a sump is installed to drain the relief, if it fails, which, if tested yearly, is highly unlikeable to fail, as the same for DCVAs. I really don't understand the flatlanders negative attitude towards below-grade backflow assemblies, unless they are too lazy to understand how to test/ winterize them.
Reply With Quote
  #1512  
Old 12-12-2012, 06:08 PM
greenmonster304's Avatar
greenmonster304 greenmonster304 is online now
LawnSite Silver Member
 
Join Date: Jul 2007
Location: La La Land
Posts: 2,300
Quote:
Originally Posted by AI Inc View Post
You would be surprised.Did a blowout a few weeks ago , system was installed by a landscaper and just about everything one could do wrong they did.
Yeah I know what you mean. a landscaper asked me to help him at one of his sites that he does the irrigation. He had low Pressure from the street and wanted a well but didn't know where to start. So we had a well installed and I tied it all in and wired it up. Then I open a valve box that he installed and saw his Manafold. It was poly with single crimp clamps. I told him when we turn the system on he might have to go around and add some clamps.
Posted via Mobile Device
Reply With Quote
  #1513  
Old 12-12-2012, 06:10 PM
irritation's Avatar
irritation irritation is offline
LawnSite Silver Member
 
Join Date: Jul 2006
Location: Indianapolis, IN
Posts: 2,434
Quote:
Originally Posted by Mike Leary View Post
I see no reason why a RP cannot be installed in a proper below-grade v.b., as long as a sump is installed to drain the relief
You should know better, rarely are they installed in a "proper below-grade v.b."
I've seen many pics on this forum with backflows buried, handles rotting off, test cocks in mud.

Last edited by irritation; 12-12-2012 at 06:16 PM.
Reply With Quote
  #1514  
Old 12-12-2012, 06:24 PM
bcg bcg is online now
LawnSite Bronze Member
 
Join Date: Mar 2005
Location: Tx
Posts: 1,710
Quote:
Originally Posted by Mike Leary View Post
I see no reason why a RP cannot be installed in a proper below-grade v.b., as long as a sump is installed to drain the relief
You're kidding, right? Sumps don't fail? Power doesn't go out?

If the level of hazard is high enough that an RP is spec'ed, it need to be installed where the relief can drain fully from gravity alone with no reliance on any other mechanical device. I know they get installed in basements a lot, I guess the justification is that a basement is big and can handle the flood but a VB can't even make that claim. Put it above grade and either put a hot box on it or wrap it with heat tape.

And for the record, I'm in the DCVA's should not be approved devices for irrigation systems camp. I don't think any irrigation BPV should be below grade.
Reply With Quote
  #1515  
Old 12-12-2012, 07:00 PM
cjohn2000's Avatar
cjohn2000 cjohn2000 is offline
LawnSite Senior Member
 
Join Date: Jun 2010
Location: Tacoma, WA
Posts: 412
Quote:
Originally Posted by irritation View Post
You should know better, rarely are they installed in a "proper below-grade v.b."
I've seen many pics on this forum with backflows buried, handles rotting off, test cocks in mud.
Biggest problem I see is groundwater and mole fill in boxes. I have always been a fan of inverting a std box under the upper box to allow clearance.
Reply With Quote
  #1516  
Old 12-12-2012, 07:02 PM
Mike Leary's Avatar
Mike Leary Mike Leary is online now
LawnSite Fanatic
 
Join Date: Mar 2007
Location: Alpine, Arizona
Posts: 20,496
O.K., I mesed-up on the nomenclature: DCVAs should have 8" of lower clearance, with 12" of gravel sump below., 8" clearance side to side. The RPs should have a "shot-bored" 1/4" per foot drain to a sanitary drain in case the relief valve goes. As I said earlier, with yearly testing and proper book keeping, there are no problems, as the checks and valves should be noted as ready for replacement way before they fail. I wonder how many of you are licensed testers?
Reply With Quote
  #1517  
Old 12-12-2012, 07:04 PM
cjohn2000's Avatar
cjohn2000 cjohn2000 is offline
LawnSite Senior Member
 
Join Date: Jun 2010
Location: Tacoma, WA
Posts: 412
Quote:
Originally Posted by cjohn2000 View Post
Biggest problem I see is groundwater and mole fill in boxes. I have always been a fan of inverting a std box under the upper box to allow clearance.
Or in the case of a winterization today, no backflow or isolation. watermaster valves with sch. 40 unions on the live side.
Reply With Quote
  #1518  
Old 12-12-2012, 07:11 PM
bcg bcg is online now
LawnSite Bronze Member
 
Join Date: Mar 2005
Location: Tx
Posts: 1,710
Quote:
Originally Posted by Mike Leary View Post
O.K., I mesed-up on the nomenclature: DCVAs should have 8" of lower clearance, with 12" of gravel sump below., 8" clearance side to side. The RPs should have a "shot-bored" 1/4" per foot drain to a sanitary drain in case the relief valve goes. As I said earlier, with yearly testing and proper book keeping, there are no problems, as the checks and valves should be noted as ready for replacement way before they fail. I wonder how many of you are licensed testers?
I am, just finished my 3 days of CEU's for renewal last week...

And I can accept a shot bored drain to a sanitary sewer (with a proper air gap) for an RP, if the elevation allows it. I can't accept relying on a sump though.
Reply With Quote
  #1519  
Old 12-12-2012, 07:15 PM
Mike Leary's Avatar
Mike Leary Mike Leary is online now
LawnSite Fanatic
 
Join Date: Mar 2007
Location: Alpine, Arizona
Posts: 20,496
Quote:
Originally Posted by cjohn2000 View Post
Or in the case of a winterization today, no backflow or isolation. watermaster valves with sch. 40 unions on the live side.
Is your avatar from my old buddy J.D's "wall of infamy" in Gig Harbor ? If you deal with him, please send my best, he was of great help to me at United Pipe.
Reply With Quote
  #1520  
Old 12-12-2012, 07:18 PM
irritation's Avatar
irritation irritation is offline
LawnSite Silver Member
 
Join Date: Jul 2006
Location: Indianapolis, IN
Posts: 2,434
Quote:
Originally Posted by Mike Leary View Post
I wonder how many of you are licensed testers?
Since 1990, never seen a DCVA on an irrigation system or an RP in a pit.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump






Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 12:12 AM.

Page generated in 0.08848 seconds with 10 queries