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  • Thermal Expansion

    Plastic piping expands and contracts with temperature changes.Most plumbers are aware of this.

    I am trying to convince a contractor to stop two hole pipe clamping to wood without insulating.

    I made a quick reference in my UPC and found only a chart refering to pipe material expansion not sizes of pipe.

    I have had to remove drywall to free up ABS that has gotten bound up between wooden obstacles thereby making them harmoniously tick as the steam heated up the pipe.

    I am trying to help him learn from my mistake.

    Anyone?

  • #2
    Re: Thermal Expansion

    Adam,

    Go to the UPC and look at IAPMO IS 5-92e1 Section 313.2. It tells you to allow for ABS to expand and contract and that ABS is suppose to be strapped to support but not rigidly restrained.

    Mark
    "Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

    I never lost a cent on the jobs I didn't get!

    Comment


    • #3
      Re: Thermal Expansion

      we always double drilled the horizontal holes as this allowed for both plastic expansion and wood shrinkage

      rick.
      phoebe it is

      Comment


      • #4
        Re: Thermal Expansion

        I know PVC expands 3/4" in 20' on 100 F rise in temp. I assume ABS would be similar. I'll try to locate the ABS rates.
        Mike

        Comment


        • #5
          Re: Thermal Expansion

          Have him come to my moms house and listen to the tickity tick tick every time the heat comes on.
          He can also check out the brand new click flooring I had to replace because the pro's pipe burst.
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          Comment


          • #6
            Re: Thermal Expansion

            Are you liable for this job?
            If you aren't, all you can do is give your best advice.
            Tell him to 2 hole strap it with 30# felt around the pipe.

            For me, if I'm not liable for a job, I'll only give my advice once or twice at the most.

            It's kinda like convincing someone to use a bidet

            Later you can say "I told you so". tick, tick, tick.............

            Tracy
            sigpic.................I Love My Toto Bidet :twofinger2: :twofinger:

            Comment


            • #7
              Re: Thermal Expansion

              What's double drilled?
              Buy cheap, buy twice.

              Comment


              • #8
                Re: Thermal Expansion

                Originally posted by gear junkie View Post
                What's double drilled?


                Well it depends if you are referring to a porno movie or plumbing.......

                Actually, I was wondering the same thing myself.

                Tracy
                sigpic.................I Love My Toto Bidet :twofinger2: :twofinger:

                Comment


                • #9
                  Re: Thermal Expansion

                  Originally posted by gear junkie View Post
                  What's double drilled?
                  On multi-floored structures the more floors you stacked on walls below the more the plumber had to allow for expansion and compression of the wood on the lower floors.Double drilling is where we would oblong the bored hole so there would be a considerable amount of wood removed above the pipe.

                  Haven't seen it enforced in years.

                  Comment


                  • #10
                    Re: Thermal Expansion

                    UPC IS5 will give you the expansion rate as well in Table 3.1. I believe it is around 1" per 20' at 80 degrees.

                    Mark
                    "Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

                    I never lost a cent on the jobs I didn't get!

                    Comment


                    • #11
                      Re: Thermal Expansion

                      Originally posted by drtyhands View Post
                      On multi-floored structures the more floors you stacked on walls below the more the plumber had to allow for expansion and compression of the wood on the lower floors.Double drilling is where we would oblong the bored hole so there would be a considerable amount of wood removed above the pipe.

                      Haven't seen it enforced in years.
                      Was this a code thing?

                      Tracy
                      sigpic.................I Love My Toto Bidet :twofinger2: :twofinger:

                      Comment


                      • #12
                        Re: Thermal Expansion

                        yes it was

                        Comment


                        • #13
                          Re: Thermal Expansion

                          Adam,

                          This is simple as it is against the Code to not give ABS free movement. It is covered under protection, support and abrasion. Just take a look at IS-5 of the UPC. I tried to do a cut-n-paste for you but the CD is protected. If you need me to FAX it to you let me know.

                          Mark
                          "Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

                          I never lost a cent on the jobs I didn't get!

                          Comment


                          • #14
                            Re: Thermal Expansion

                            Does your code demand expansion joint at specific distances?

                            Comment


                            • #15
                              Re: Thermal Expansion

                              Originally posted by myakka View Post
                              Does your code demand expansion joint at specific distances?
                              No but it does require offsets.

                              Mark
                              "Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

                              I never lost a cent on the jobs I didn't get!

                              Comment

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