Moen Tub/Shower piping size & cartridge replacement...

Discussion in 'Shower & Bathtub Forum & Blog' started by Why did I try this?, Sep 6, 2012.

  1. Why did I try this?

    Why did I try this? New Member

    Messages:
    27
    Location:
    Wisconsin
    Hi,

    My original tub/shower piping is 1/2" i.d. but then goes down to these narrow elbows into a Moen 1016p valve body. Is it standard to have the pipe connect in the valve body instead of o.d. of the valve body?

    Thank you
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,412
    Location:
    Bothell, Washington
    A picture may be nice. Are you talking about street 90 bends into a Posi-Temp valve?
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,313
    Location:
    New England
    Many shower valves have male threads to accept a female threaded connector from the supply line. But, the inside of that valve is often bored out to accept the pipe in as if it was a coupling (i.e., it is the proper sized socket for accepting the supply pipe to be soldered in). Without seeing what you have, it probably is okay, but we'd need to see it to be sure.
  4. Why did I try this?

    Why did I try this? New Member

    Messages:
    27
    Location:
    Wisconsin
    Here it is Valve.jpg
    My guess is that it is 3/8" i.d. The outside appears to be 1/2". The actual bent part, not the elbow openings.
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,237
    Location:
    Cave Creek, Arizona
    The connection IS 1/2", but then they connect 1/2" PEX to it which DOES decrease the i.D. to about 3/8".
Similar Threads: Moen Tub/Shower
Forum Title Date
Shower & Bathtub Forum & Blog How do you identify what Moen Posi-temp tub/shower valve you have? Jun 28, 2014
Shower & Bathtub Forum & Blog Help Removing Moen Part from Tub/Shower Valve (picture included) Feb 4, 2011
Shower & Bathtub Forum & Blog Temperature Settings on Moen Single Handle Tub/Shower Faucet Mar 9, 2010
Shower & Bathtub Forum & Blog Moen rough-in tub/shower valve questions? Dec 31, 2007
Shower & Bathtub Forum & Blog older Moen tub/shower valve leak Oct 25, 2007

Share This Page