[RE-wrenches] SDHW and High Mains Pressure

[Peter Parrish]

Dean,

 

Thanks for the info on the tankless water heater. However, when I looked up
the specs on the Watts regulator, I found the same behavior: zero pressure
drop at zero flow. So the Watts regulator will not solve the problem of high
water pressure at night (when there is zero or very little flow). 

 

Anyone else know of a control unit that can limit the water pressure (to say
60 psi) on the customer side under all flow conditions (including zero)?

 

- Peter

 

Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Dean T.
Newberry
Sent: Sunday, December 07, 2008 4:18 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] SDHW and High Mains Pressure

 

Hello Peter,
You want a Watts Regulator.

Here's the link: http://www.watts.com/pro/_products_sub.asp?catId=64
<http://www.watts.com/pro/_products_sub.asp?catId=64&parCat=285> &parCat=285


Good Luck

Peter Parrish wrote: 

We are getting ready to install a SDHW system for a customer and we looked
at a number of things regarding his current set up. I just posted a question
about tankless heaters but I wanted this query to be a separate one. The
customer's mains water pressure is 88 psi on a Saturday afternoon and some
time over the next 18 hours, the pressure went as high as 96 psi. I
understand that 80 psi is the high end of the safe range in general and that
96 psi on a regular basis can/will damage valves and possibly trigger T&P
valves on water heaters.

 

At the recommendation of a plumber I know I looked into pressure reducers,
specifically the Wilkins/Zurn line. All the Wilkins regulators produce zero
pressure drop at zero flow. What good are these products in protecting
plumbing systems from high mains pressures at night when pressures tend to
be the highest and usage is at a minimum or even zero?

 

Are there products that will prevent system pressures from exceeding a set
point (e.g. 60 psi) under any flow condition including zero?   

 

- Peter

Peter T. Parrish, President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com 

 





  _____  



 
_______________________________________________
List sponsored by Home Power magazine
 
List Address: RE-wrenches at lists.re-wrenches.org
 
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
 
Check out participant bios:
www.members.re-wrenches.org
 
  





-- 
Dean T. Newberry
Talbott Solar & Radiant Homes Inc.
430 D Street
Davis, CA 95616
 
T: 530 219-3606
F: 530 758-8187
E: deant at talbottsolar.com
W: http://www.TalbottSolar.com/
   http://www.TalbottRadiant.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20081208/b53f725e/attachment-0004.html>