(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 15 of 21

Thread: Does this quote make sense? Dual Shower w/ Body Sprays

Hybrid View

  1. #1
    DIY Junior Member zipsilver's Avatar
    Join Date
    Jun 2012
    Location
    Florida
    Posts
    7

    Exclamation Does this quote make sense? Dual Shower w/ Body Sprays

    House has 1/2 supply lines.

    Custom Shower Design
    MOEN TS276BN
    +
    MOEN TS3400BN

    Her Shower:
    1 Moen Exactemp Shower Valves at 3/4" (2.5gpm at max) S3600
    4 Moen Body Sprays new version at 1/2" piping (ea at 2.0gpm at max) Model TS1322
    1 Moen Handshower

    His Shower
    1 Moen Exactemp Shower Valve at 3/4" (2.5 gpm at max)

    Shower and Body sprays have independent volume controls.

    Max demand her shower with everything on blast: showerhead and 4 valves = 10.5 gpm
    Frequent use: Just dual showerheads at 5.0gpm


    Contractor is finally willing to look at plans and says whoa big change order!
    Plumber has not done any kind of pressure/flow tests, but contractor has decided to run seperate 3/4" cpvc in attic full length of house to bring 3/4 to shower. Does that make sense? Does this price make sense?
    Others have said this Moen system works great with 1/2" and just stepped up to 3/4 for connections.
    No Flow/Pressure tests have been completed.


    NOTE: (plumber suggestion)
    I have an additional 3/4" Cold water supply(Hose Spigot) right outside of bathroom wall.
    20' from city meter.
    (it may be 3/4, or it may be 3/4 spliced into 1/2' under ground he said)

    Name:  Change Order.jpg
Views: 406
Size:  50.9 KB

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,617

    Default

    WE have no way of knowing because we do NOT know what your house looks like. But, since 1/2" CPVC is only slightly larger than 3/8" copper, I would question how much flow you would get from the valves if the length of the runs is substantial. Even those new 3/4" CPVC lines would only be the equivalent of 1/2" copper. In other words, 1/2" supply lines are ridiculous, and I would NEVER install them, assuming I would use any type of plastic piping.
    Licensed residential and commercial plumber

  3. #3
    DIY Junior Member zipsilver's Avatar
    Join Date
    Jun 2012
    Location
    Florida
    Posts
    7

    Default

    I am not sure if you saw the details I took the time to include.
    I did list the specific parts and rough in dimensions.
    Here is an easier way to review the system and the solution they are proposing.
    http://m.moen.com/search?search_term...UMER%3ATS276BN

    and

    http://m.moen.com/?s_kwcid=TC-15824-...MER%3ATS3400BN


    There is no 1/2" except for the body sprays and they would be fed off the flow of the 3/4" run to the independent volume control.

    The length fo the run is disclosed at 120'

    The question is will running 3/4" CPVC (minus friction/fitting resistance negate any benefits of going up in size)
    Would I be better off doing what the plumber suggested and just tying into an additional cold water near the bathroom for pressure?

  4. #4
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,192
    Blog Entries
    1

    Default

    The hot will need 3/4" from the water heater. The cold should also be a combined 3/4"
    Most outside faucets are run with 1/2", even though the body of the faucet looks to be 3/4"
    Plumbers normally run 3/4" cold to a bathroom set anyway to prevent shower shock if someone flushes a toilet while in the shower.
    I wouldn't go to the trouble of putting that many shower heads in unless you can really supply them.
    The Moen IOdigital system also has 3/4" incoming. There seems to be a pattern here. And like hj mentions, 3/4" CPVC isn't even that. For instance, you can't run plastic or PEX pipe to a tub spout diverter; it forces water out the shower head. Those are run in copper or full bore threaded pipe to prevent restriction. After the wall is tiled in, you options go down to nearly zip!

  5. #5
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    Don't equate 3/4" CPVC with 3\4" copper or ips piping. Not close to the same thing,

  6. #6
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,388

    Default

    When you say the house has 1/2" supply, is that from the street? If so, doesn't really matter what you do inside, the supply line is just too small.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  7. #7
    DIY Junior Member zipsilver's Avatar
    Join Date
    Jun 2012
    Location
    Florida
    Posts
    7

    Default

    Thanks Terry.

    I did a lot of research on this forum and read that you have no seen problem with 2 Moen showerheads on 1/2" Copper.

    I have already purchased both systems and rough-ins.
    Name:  MOEN-TS276BN.jpg
Views: 379
Size:  13.3 KB

    Name:  TS3400BN.jpg
Views: 325
Size:  4.4 KB

    Question 1: Regarding the proposal above.
    Will routing 3/4" (CPVC) at great expense provide any improvement over existing 1/2" Copper?

    Question 2: What is a proposed alternate solution? (lines will be ran in Florida Attic approx 60')

    Typical use: 1 Person = 2.5gpm plus body sprays
    Main Showerhead and body sprays

    Alternate use: 2 people
    Just 2 shower heads will suffice = 5.0gpm

    No Pressure Tests have been done even after requested.

    Drain Requirements also:
    Concrete is scheduled to be poured tomorrow around 2" drain.
    I have brought up concern that I have read on here that this may not be adequate.

    Water Heater: 50Gal Electric Dual element
    House has 3/4" supply from Curb to Waterheater

    Any advice is greatly appreciated.

  8. #8
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,617

    Default

    3/4" CPVC and 1/2" copper are almost the same size, and a plumber would SELDOM use it for more than two faucets, and even then on a short run.
    Licensed residential and commercial plumber

Similar Threads

  1. Body Sprays in Shower
    By Frankie in forum Shower & bathtub Forum & Blog
    Replies: 2
    Last Post: 11-07-2013, 08:28 PM
  2. Does this make sense?
    By mark_g in forum HVAC Heating & Cooling
    Replies: 3
    Last Post: 04-13-2009, 03:23 PM
  3. does this make any sense
    By jburton32 in forum Electrical Forum discussion & Blog
    Replies: 31
    Last Post: 05-13-2008, 07:25 PM
  4. New Shower with body sprays - wrong mixing valve
    By mbeaver in forum Shower & bathtub Forum & Blog
    Replies: 3
    Last Post: 02-22-2008, 07:00 AM
  5. Multi-Shower Heads/Body Sprays
    By Lenny B in forum Shower & bathtub Forum & Blog
    Replies: 3
    Last Post: 01-11-2007, 01:11 PM

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
  •