(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 4 of 4

Thread: Pipe Size Question - PEX to Galvanized

  1. #1
    DIY Junior Member jgold47's Avatar
    Join Date
    Nov 2010
    Location
    Detroit, MI
    Posts
    27

    Default Pipe Size Question - PEX to Galvanized

    House was built in the 20's. Piping going to second floor bathroom (shower/toilet/sink) is galvanized. At some point before we bought the house, most of the basement feed lines were re-plumbed using PEX and crimp rings.

    My question is twofold...

    Most of the supply lines are 3/4", dropping to 1/2 inch to feed the kitchen, first floor bath, hose bibs, etc... for some reason, they also dropped to 1/2" to feed the 2nd floor lav, dropping to 1/2" and connecting to 3/4" galvanized heading up stairs.

    Question 1. Is there any reason to downsize the supply to 2nd floor lav? Or was the installer just sloppy? Would upsizing to 3/4" make a difference? The water pressure is ok, not great, and cant use more than one item at a time.

    Question 2. How do you switch out PEX like this? Can the rings be removed preserving the pipe, or am I looking at having to replace entire sections? I've never worked with PEX, so I would have to invest in all of the tools, but I also don't know any of the rules for working with it.


    Thanks in advance!

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,191
    Blog Entries
    1

    Default

    http://www.terrylove.com/watersize.htm

    Normally you can run two plumbing fixtures on 1/2"
    A bathroom set would need 3/4" on the cold and 1/2" for the hot.

  3. #3
    DIY Junior Member jgold47's Avatar
    Join Date
    Nov 2010
    Location
    Detroit, MI
    Posts
    27

    Default

    Quote Originally Posted by Terry View Post
    http://www.terrylove.com/watersize.htm

    Normally you can run two plumbing fixtures on 1/2"
    A bathroom set would need 3/4" on the cold and 1/2" for the hot.
    thanks Terry - Any issues with upsizing the feed lines to the upstairs? Given that they are ancient and galvanized? shouldnt change the line pressure just the flow right?

  4. #4
    DIY Junior Member Cody Smith's Avatar
    Join Date
    Oct 2013
    Location
    Colorado
    Posts
    1

    Default

    Is there a difference between Rifeng PEX and others? I've found better prices on Rifeng, but I don't want to get involved with 'cheap' lines. I've found some prices here if you're not familiar.

Similar Threads

  1. Galvanized pipe question...
    By fatdaddy in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 9
    Last Post: 05-07-2009, 04:14 PM
  2. upgrading pipe size question
    By jjfta in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 4
    Last Post: 11-29-2007, 07:05 AM
  3. question about galvanized pipe
    By willl in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 19
    Last Post: 06-14-2007, 10:36 AM
  4. pipe size question
    By Gary Swart in forum Irrigation / Sprinkler Forum
    Replies: 1
    Last Post: 04-21-2007, 08:04 AM
  5. Pipe Size Question
    By bpolson2 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 1
    Last Post: 01-20-2005, 11:24 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •