Register free!


Reply
 
Thread Tools   Display Modes
  #1  
Old 06-24-2012, 06:30 PM
chris2879 chris2879 is offline
LawnSite Member
 
Join Date: Sep 2010
Posts: 8
Febco Backflow vibration/hammer

I recently added a 8th zone for drip irrigation to my sprinkler system. The drip system has 3/4" pipe with a 30 psi pressure regulator and about 25 emitters taped into the 3/4" pipe. Some of the 3/4" pipe goes uphill.

The problem that i noticed is when i turn on the drip zone, the back flow preventor seems to be hammering or vibrating. The flow to the emitters is very low but that is intended to do a longer slow soaking for the flowers and roses. I read someplace that the back-flow preventor could be getting messed up because there is not enough flow.

Anyone have any idea what the issue is and how i can fix it?
Reply With Quote
  #2  
Old 06-24-2012, 07:40 PM
Mikegyver Mikegyver is offline
LawnSite Bronze Member
 
Join Date: Jan 2010
Location: Longview TX
Posts: 1,803
PVB, DCVA, or RP?
__________________
High end commercial, multi-family and residential lawn care, irrigation (LI and BPAT), and landscaping.
Mikegyver Pics Thread
Reply With Quote
  #3  
Old 06-24-2012, 07:46 PM
chris2879 chris2879 is offline
LawnSite Member
 
Join Date: Sep 2010
Posts: 8
Pressure Vacuum Breaker (PBV).
Reply With Quote
  #4  
Old 06-24-2012, 08:28 PM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is online now
LawnSite Fanatic
 
Join Date: Mar 2005
Location: metro NYC
Posts: 40,702
What make and model of zone valve?
Reply With Quote
  #5  
Old 06-24-2012, 08:44 PM
chris2879 chris2879 is offline
LawnSite Member
 
Join Date: Sep 2010
Posts: 8
It's an Irritrol 2400T 1" (w/o flow control)
Reply With Quote
  #6  
Old 06-24-2012, 09:03 PM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is online now
LawnSite Fanatic
 
Join Date: Mar 2005
Location: metro NYC
Posts: 40,702
try a flow-control valve
Reply With Quote
  #7  
Old 06-24-2012, 09:26 PM
chris2879 chris2879 is offline
LawnSite Member
 
Join Date: Sep 2010
Posts: 8
I tried limiting the flow by closing the output of the PVB and it had no affect, which would be similar to the behavior of a flow control valve right? Could it be something with the PVB?
Reply With Quote
  #8  
Old 06-24-2012, 09:37 PM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is online now
LawnSite Fanatic
 
Join Date: Mar 2005
Location: metro NYC
Posts: 40,702
just change the damn zone valve and stop wasting our time - if you're handy, you can swap the internals of the 2400TF with your valve
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 10:42 AM.

Page generated in 0.06870 seconds with 9 queries