Register free!
Search
 
     

Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 11-14-2013, 11:30 AM
Without A Drought Without A Drought is online now
LawnSite Senior Member
 
Join Date: Jul 2006
Location: New Jersey
Posts: 820
PRV help

We're starting a new install soon with 115 lbs. static. 2" mainline off HDPE through an RPZ into PVC.

i've looked at watts, wilkins, and febco. and dont see any major differences besides price.

Anyone have any preferences?
Reply With Quote
  #2  
Old 11-14-2013, 03:06 PM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is online now
LawnSite Fanatic
 
Join Date: Mar 2005
Location: metro NYC
Posts: 39,810
I'd avoid Watts because I think they still use a non-stainless-steel spring, although that may be only for the 25A model you see in homes. I've used Wilkins BR-4 to get the high-end pressure capability missing in many standard PRVs (they may have new model numbers now, on account of the lead-free plumbing rules as of next year)
Reply With Quote
  #3  
Old 11-14-2013, 03:29 PM
Without A Drought Without A Drought is online now
LawnSite Senior Member
 
Join Date: Jul 2006
Location: New Jersey
Posts: 820
central recommended the wilkins. is also cheaper than watts
Reply With Quote
  #4  
Old 11-14-2013, 05:40 PM
DanaMac's Avatar
DanaMac DanaMac is online now
LawnSite Fanatic
 
Join Date: Mar 2002
Location: Somewhere in the state of CO
Posts: 13,046
Never seen a Febco PRV. I see more Watts fail than I do the Wilkins.
Reply With Quote
  #5  
Old 11-14-2013, 06:23 PM
Without A Drought Without A Drought is online now
LawnSite Senior Member
 
Join Date: Jul 2006
Location: New Jersey
Posts: 820
wilkins it will be then.

thanks for the help guys.

this new job is gonna be fun, it's an apartment complex, 9 buildings. building on a brown site, so there is a clay cap about 14 inches down.
Reply With Quote
  #6  
Old 11-14-2013, 06:35 PM
irritation's Avatar
irritation irritation is offline
LawnSite Silver Member
 
Join Date: Jul 2006
Location: Indianapolis, IN
Posts: 2,556
You may not need a prv, don't restrict what's available and no need to dig below 14" unless it's for the tap.
Reply With Quote
  #7  
Old 11-14-2013, 07:00 PM
Without A Drought Without A Drought is online now
LawnSite Senior Member
 
Join Date: Jul 2006
Location: New Jersey
Posts: 820
definitely need the prv

and we won't be going below that depth, but normally i like to put a 2" main around 18 inches. make pulling lateral less worrisome.
Reply With Quote
  #8  
Old 11-14-2013, 07:19 PM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is online now
LawnSite Fanatic
 
Join Date: Mar 2005
Location: metro NYC
Posts: 39,810
A possible alternative to a standard PRV would be a pressure-regulating master valve. An issue with all PRVs is their insertion loss when the regulation point is not a minimum difference from the static pressure. It can go up significantly.

With a Wilkins, I remember performance charts that didn't make it absolutely clear that the curves only applied if the set point was at least 50 psi lower than the inlet pressure. On 115 psi static, that means you'd regulate to 65 psi tops, then lower that with your RPZ. That brings you down to about 50 psi at your source.

With a Master Valve as the regulator, it can come after the RPZ, and knock down the 100 psi (after the RPZ loss) to 80 psi, and give you superior flow in the bargain.
Reply With Quote
  #9  
Old 11-14-2013, 07:20 PM
irritation's Avatar
irritation irritation is offline
LawnSite Silver Member
 
Join Date: Jul 2006
Location: Indianapolis, IN
Posts: 2,556
Quote:
Originally Posted by Without A Drought View Post
definitely need the prv
I don't know why, 115 on main and valves is not a problem. You certainty won't have that at the heads if designed properly.
Reply With Quote
  #10  
Old 11-14-2013, 07:35 PM
Without A Drought Without A Drought is online now
LawnSite Senior Member
 
Join Date: Jul 2006
Location: New Jersey
Posts: 820
MV may be an option. i'm generally not a fan of them.
ill do some more research and get back.
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 10:41 PM.

Page generated in 0.08345 seconds with 7 queries