Return to the Plumbing Forum | Post a Follow-Up

1' prv?

Posted by fenston (My Page) on
Sun, Apr 22, 12 at 9:08

Upon closer inspection my used home I just bought has a 1" pipe coming in from the street (no existing PRV). It then branches at a tee that has 1" 3/4" and 3/4" fittings. One 3/4" fitting goes to the front sprinkler system and hose bib. The other one goes into the house.

I'm thinking of just buying a 1" to 3/4" reducer to feed a 3/4" PRV and the output of the PRV will feed everything as before.

Is this advisable? I'm thinking I will get reduced flow out of this setup VS. what is there already. But then I am installing a PRV to reduce the pressure which would reduce the flow anyway so perhaps this is a moot point. Any thoughts appreciated. Thanks.

Follow-Up Postings:

RE: 1' prv?

What is the pressure coming in from the street main?

If the pressure does not exceed 85psi and is not likely to even intermittantly exceed 85psi there is no need to install a PRV.

On the other hand, even if you did install a PRV, that would not reduce the volume of flow.

RE: 1' prv?

Reductions in pressure and addition of a component will result in reduced flow and potentially open end pressure with the adddition of a PRV.

Sizing PRV's is a science, read explanation here:

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Plumbing Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here