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Shower Rough in valve Q

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guzzinerd
guzzinerd Member Posts: 412
edited January 11 in Plumbing
1000029022.jpg

Good day. This thing is tagged with hot on the left side. How important is that? I ask because the hot supply on the shower I'm working on is on the other side.

Thanks

Alex

P.s. I'm ditching the center mixer for this dual valve.

Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 26,996

    Two independent valves? From the hydraulic standpoint, may not make much difference.

    HOWEVER

    I don't think,, in looking at a lot of sinks, tubs, showers, and whatnot all over Europe and North America and parts of the Far East over lamost 9 decades, that I have ever seen a dual handle faucet setup with the hot on the right and the cold on the left.

    Somebody will get burned. Badly. If you switch them.

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    guzzinerd
  • guzzinerd
    guzzinerd Member Posts: 412

    Thanks. It's in my home and was plumbed that way when I got it. Will be putting red and blue knobs on them so will be difficult to confuse.

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

    mattmia2
  • guzzinerd
    guzzinerd Member Posts: 412

    ...Just looked at the other faucets in the place, hot is on the left on all of them 😆

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • Jamie Hall
    Jamie Hall Member Posts: 26,996

    Red and blue knobs won't do. Hot left, cold right. We have super strong reflexes on that sort of thing — and if it's in the dark… !

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    mattmia2
  • hot_rod
    hot_rod Member Posts: 27,058
    Screenshot 2026-01-11 at 4.17.39 PM.png

    Your ears will burn if ever you sell that home :)

    Perhaps along with someone skin😮

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • guzzinerd
    guzzinerd Member Posts: 412
    edited January 11

    It's an old church. Plumbed by the devil maybe. No burns after 5 years

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • Jamie Hall
    Jamie Hall Member Posts: 26,996

    Just figure out a way to run the feeds correctly. Can't be that hard (yeah, right).

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    mattmia2
  • guzzinerd
    guzzinerd Member Posts: 412

    Yeah. No.

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • guzzinerd
    guzzinerd Member Posts: 412
    edited January 12

    Look at the pic again and my reply just before your comment please...the hot WAS on the right out of the box (indicated by the little sticker). My question was if i could just hook it up with the hot to the left, which i did. All of the faucets in the house have heat left, cold on right.

    Maybe i should have taken the pic from the front instead of behind the rough in valve.

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • guzzinerd
    guzzinerd Member Posts: 412

    Writing this after i wrote the hots are all on the left wasn't confusing at all 😅

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • mattmia2
    mattmia2 Member Posts: 15,984

    valve is designed for a feed up from below the floor. note that in most jurisdictions you need a tempering valve that limits the temp of the hot water supplied to that fixture since it doesn't have a pressure balanced cartridge.

  • hot_rod
    hot_rod Member Posts: 27,058

    I don’t think two or three handle tub or shower valves are code compliant anymore? Even with a TAFR at the shower head. Thermal activated flow restrictor

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    yellowdogrick in Alaska
  • guzzinerd
    guzzinerd Member Posts: 412

    My hot water supply is tankless that is set to 115 max. You'd have to try really hard to get scalded.

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • Intplm.
    Intplm. Member Posts: 2,906

    Fed from the top the bottom or any another imaginable direction, hot should be fed from the left as the user would expect. Piping the shower valve correctly is the responsibility of a conscientious installer. Cross the pipes to the proper sides.

    hot_rodmattmia2Alan (California Radiant) Forbes
  • guzzinerd
    guzzinerd Member Posts: 412

    As I mentioned several times now, all my hot water is fed from the left. The feed in the shower is from the ceiling, which is why I needed to flip this valve.

    Happy new year everyone

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • mattmia2
    mattmia2 Member Posts: 15,984

    back when this type of valve was common you could order it as bottom or top feed or with bottom and top connections so you could feed it from either direction or you could pipe through it to a separate shower valve or to a bathroom on the next floor.

  • rick in Alaska
    rick in Alaska Member Posts: 1,522

    I think this is a communication issue. I believe you are saying the water lines coming from the ceiling are plumbed with the hot feed coming down on the left side as you face it, but your shower valve body says the hot is on the left if the valve ports are pointing down, and you want to just turn the valve over so the ports are pointing up to make it easier to plumb.

    The problem of doing this is that the valve has ports in the center of the body for the shower and the tub fill, and have to stay in the position you show it, or the valve will want to be dumping water out of the shower head when you are trying to take a shower. The only way you can make work what I believe you are trying to do, is run the pipe down past the valve, and return it up in to the valve.

    Rick

    mattmia2hot_rodAlan (California Radiant) Forbes
  • mattmia2
    mattmia2 Member Posts: 15,984

    depends on the specific valve. some are designed so you can install the parts in different ways and make either port indexed the right way and the diverter diverting one way or the other, others it is fixed in how it is cast and machined.

  • pedmec
    pedmec Member Posts: 1,283

    that valve don't fly here in the country of Massachusetts

    2. The water supply to a shower head shall be supplied through a Product-accepted individual thermostatic, pressure balancing or combination thermostatic/pressure balancing valve

  • hot_rod
    hot_rod Member Posts: 27,058

    I don't believe any plumbing code allows two handle valves. Tub shower valves need to be ASSE 1016 compliant.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    rick in Alaska
  • guzzinerd
    guzzinerd Member Posts: 412
    edited January 16

    "no direct indication in the provided search results that ASSE 1016-2005 is adopted or enforced as a mandatory code requirement within New Mexico’s construction or plumbing regulations."

    The girls didn't like the center knob so I picked this up at the local hardware store. They like it.

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • hot_rod
    hot_rod Member Posts: 27,058

    New Mexico has a state plumbing code that is based off the 2021 UPC Uniform Plumbing Code

    If you are a licensed plumber in NM you should have access to a copy

    IMG_1829.jpeg
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • mattmia2
    mattmia2 Member Posts: 15,984

    anyone should be able to access it now because laws can no longer be copyrighted.

    michigan's code also specifically says this requirement can not be met with an inline tempering valve for some reason.

  • Intplm.
    Intplm. Member Posts: 2,906

    This makes me wonder if any "grandfathered" code allowances still exist.

  • hot_rod
    hot_rod Member Posts: 27,058

    any jurisdiction can add addendums to a code specific to their area

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream