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

Jersey2

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

Jamie Hall

Most likel y minor differences in formulation -- and what the manufacturer has chosen to certify it to.

hot_rod

I would use a heavier wall for in ground bury, a 200 or higher. The 100 psi is more like irrigation tube

Jersey2

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.

Alan (California Radiant) Forbes

Something like aquaPEX would work, no?

Mad Dog_2

PEX.......Much more durable  mad dog

hot_rod

You can buy Pex in 10’ straight lengths at the box stores. A crimp or expansion fitting is best. Shark type fittings work also.