Where to place the main valve

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Bob from accounting, Jun 27, 2020.

  1. Bob from accounting

    Bob from accounting Member

    Joined:
    Mar 5, 2020
    Location:
    California
    This is a random question?
    Our building has a main line and every unit ties into the main 1 1/4" line in their garage location.
    I will be tying into the main, not at my unit's original location which is inconveniently right in the dead smack middle of the garage.
    My new location will be closer to the side of the garage wall.
    Well my question is:
    I have to tie in and then run 15' of 1" pipe straight back along the wall.
    This means I need 10' run and then a 5' run of straight pipe. ( I can only get 10' sections so this is what I have to work with)
    So instead of a main valve at the main tie in reducer tee, then 10' of pipe then a coupling then 5' of pipe. I want to use the main shut off valve as the coupling at the end of the initial 10' run and then add the 5' run. So swap the coupler with the main valve. So like this...Reducer tee at the main --> 10' of pipe, main shut off to the unit--> 5' more of pipe.
    Is is ok if my shut off is not right at the tie in and instead 10' away.
    Again maybe a dumb question?
    I suppose pin hole leaks or something in the straight 10' section means I turn of the whole building. I can do that. Placing the Main valve closer to my water softener and making it convenient and more accessible seems good in my head, but my head has wood rot and I need to ask people that actually know what they are doing.
    Is there a code or something that says the shut off has to be as close as possible to the tie in?
    Thanks for your thoughts.
     
  2. Jeff H Young

    Jeff H Young In the Trades

    Joined:
    Feb 27, 2020
    Location:
    92346
    So you could have a tee at the main and then a short piece of pipe then the valve but instead you want a 5 foot with no additional joints. Actualy your saving a coupling on your side of the main. I cant see a problem moving the valve 4.5 foot away . its acsessable, and close enough and not signifigantly differant . I think its fine
     
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. Bob from accounting

    Bob from accounting Member

    Joined:
    Mar 5, 2020
    Location:
    California
    OK thanks Jeff
    To explain this again another way.
    Instead of the main valve going an inch from the tie it, the main valve would be 10' away from the tie in. Yes this saves me one less joint to sweat and moves the location of the valve from entry point to 10' further way next to water softener.
     
  5. Bannerman

    Bannerman Well-Known Member

    Joined:
    Mar 19, 2014
    Location:
    Ontario, Canada
    Locating the main shut-off as close as possible to where the water service enters your unit means having the ability to anytime stop leakage flow anywhere a leak may occur within your unit. A leak occurring in the 10' extension before your unit's main shut -off valve will mean shutting-off flow to all units until repairs are possible.

    You mention the current inconvenient location, but realistically, how often will you be accessing that valve? If you want a more convenient location for regular use, there is no reason you can't install an additional isolation valve further downstream, leaving the original main shut-off valve at its current location if needed for a pipe failure close to the entry location.
     
  6. Bob from accounting

    Bob from accounting Member

    Joined:
    Mar 5, 2020
    Location:
    California
    Yes this is everything going through my head right now. You are very convincing.
     
Similar Threads: Where place
Forum Title Date
Plumbing Forum, Professional & DIY Advice Complete Replacement of DWV after redesign - where to start installing? Feb 23, 2020
Plumbing Forum, Professional & DIY Advice Where to cut to replace the P trap? Jan 30, 2020
Plumbing Forum, Professional & DIY Advice Where to Place Water Hammer Arrester Dec 22, 2018
Plumbing Forum, Professional & DIY Advice Can someone please tell me what kind of antique shower arm I have? and where I can buy a replacement May 27, 2017
Plumbing Forum, Professional & DIY Advice Where to place Tankless Water Heater Condensation Line Mar 22, 2017

Share This Page