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  • Hot Water Heater Supply Shutoff Valve

    I am replacing the shutoff valve in my 3/4" supply line to the hot water heater. The question I have is, can I use a compression fitting or do I need to use the soldered valve? I am hesitant to use the soldered ball valve for fear of cooking the vinyl liner around the inner ball. I only have a propane torch and fear I will get the valve too hot.
    If the compression fitting is not recommended, should I sweat threaded fittings and use a threaded shutoff valve?

    Thanks

    John

  • #2
    Re: Hot Water Heater Supply Shutoff Valve

    What I recommend doing is sweat a male adapter to the copper tubing and then use a threaded brass ball valve.

    Comment


    • #3
      Re: Hot Water Heater Supply Shutoff Valve

      Go to Home Depot and get a Shark bite valve its goof proof just push it on

      Comment


      • #4
        Re: Hot Water Heater Supply Shutoff Valve

        We've debated sharkbite fittings alot around here....

        SOMETIMES they're ok.

        If your valve will be subject to any vibration or movement, a sharkbite valve will likely fail prematurely (the o-ring inside will fail and cause a leak).

        You're on the right track with not wanting to solder near the heater itself.

        If your skill level allows, this is what I recommend:

        >solder a female adapter onto a short stub of copper

        >solder a full port ball valve onto the other end of the stub

        > solder a union to the cold inlet pipe

        >cut another small piece of copper for the distance between the valve and the union

        >all copper can be joined before attaching to the water heater, except for the union

        If you'd rather solder less, or are short on space, post a few pics, and one of us can likely be of more assistance.

        Comment


        • #5
          Re: Hot Water Heater Supply Shutoff Valve

          My preference in this order would be:

          ips ball valve to sweat male adapters
          sweat ball valve
          compression ball valve
          ,
          ,
          ,
          ,
          distant #4.......shark

          Comment


          • #6
            Re: Hot Water Heater Supply Shutoff Valve

            Get a ProPress
            Ron Hasil Lic #058-160417
            A-Archer Sewer & Plumbing specializing in:
            Tankless Water Heaters | Drain and Sewer Cleaning
            Sump and Ejector Pumps | Backflow RPZ Testing

            Comment


            • #7
              Re: Hot Water Heater Supply Shutoff Valve

              does anyone not use dielectric unions anymore thought they were coed maybe thats just IL. if you are going to thred a male adapter into water heater then get brass male adapter so ther is no electrolisis
              ??? if I spelled it right but you get the point
              SMELLS LIKE $$$$$$ TO ME

              Comment


              • #8
                Re: Hot Water Heater Supply Shutoff Valve

                Originally posted by post plumber View Post
                does anyone not use dielectric unions anymore thought they were coed maybe thats just IL. if you are going to thred a male adapter into water heater then get brass male adapter so ther is no electrolysis
                ??? if I spelled it right but you get the point
                ...you were close. (corrected above)

                Comment


                • #9
                  Re: Hot Water Heater Supply Shutoff Valve

                  "post plumber", For What It's Worth: I've studied Metallurgy for some years before retiring, and unless something's changed out there: "Electrolysis", a.k.a. "Galvanic Corrosion can/will occur between any two dissimilar metals. I understand your point here but in this case, as I've heard so many times: "Brass won't save your A**". David

                  Comment


                  • #10
                    Re: Hot Water Heater Supply Shutoff Valve

                    Originally posted by post plumber View Post
                    does anyone not use dielectric unions anymore thought they were code maybe thats just IL. if you are going to thread a male adapter into water heater then get brass male adapter so there is no electrolysis
                    ??? if I spelled it right but you get the point
                    Illinois code does say you can use a dielectric union or a brass fitting for joining differnt metals. I try to use an brass IPS union coming off the nipple, or use brass nipples.
                    Ron Hasil Lic #058-160417
                    A-Archer Sewer & Plumbing specializing in:
                    Tankless Water Heaters | Drain and Sewer Cleaning
                    Sump and Ejector Pumps | Backflow RPZ Testing

                    Comment


                    • #11
                      Re: Hot Water Heater Supply Shutoff Valve

                      Originally posted by SewerRatz View Post
                      Illinois code does say you can use a dielectric union or a brass fitting for joining differnt metals. I try to use an brass IPS union coming off the nipple, or use brass nipples.
                      my fault I thout that he was screwing the male adapter into water heater Red to fast and was to tired that night sorry
                      SMELLS LIKE $$$$$$ TO ME

                      Comment

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