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Question about the PSI of 1" Poly water pipe vs wall thickness

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Jersey2
Jersey2 Member Posts: 165
Looking at poly pipe, True Value has 1" pipe that is rated at 125psi. I measured the wall diameter to be a little bit over 0.07. Home Depot also has 1" poly pipe, that is rated at 100psi. From their specs, the wall diameter is 0.08". How come the thicker pipe at Home Depot has a lower PSI rating than the thinner walled True Value pipe? I've been shopping for poly pipe because I will be replacing a short piece that goes from the pump output to my storage tank and it is marked 125psi.

https://ithacaagway.com/p/polyethylene-pipe-008588613100

https://www.homedepot.com/p/1-in-x-100-ft-IPS-100-psi-NSF-Poly-Pipe-X2-1100100/205903465
I'm not a plumber or hvac man and my thoughts in comments are purely for conversation.
Mad Dog_2

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 23,661
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    Most likel y minor differences in formulation -- and what the manufacturer has chosen to certify it to.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    Jersey2Mad Dog_2GGross
  • hot_rod
    hot_rod Member Posts: 22,491
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    I would use a heavier wall for in ground bury, a 200 or higher. The 100 psi is more like irrigation tube
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    Jersey2Mad Dog_2Solid_Fuel_Man
  • Jersey2
    Jersey2 Member Posts: 165
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    I need about a 3.5' piece that's in the basement. What happened is, the brass check valve going into my water storage tank got a tiny hole in the body so it will need replacing. And to the left of that is an elbow, and then the poly pipe. I am pretty sure I won't be able to pry the poly pipe off and will have to cut it, and then have to replace it. The current one is rated at 125psi so I figured I would use the exact same type of pipe.






    I'm not a plumber or hvac man and my thoughts in comments are purely for conversation.
    Mad Dog_2
  • Alan (California Radiant) Forbes
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    Something like aquaPEX would work, no?
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
    Mad Dog_2
  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,251
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    PEX.......Much more durable  mad dog
  • hot_rod
    hot_rod Member Posts: 22,491
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    You can buy Pex in 10’ straight lengths at the box stores. A crimp or expansion fitting is best. Shark type fittings work also.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    Mad Dog_2