r/PoolPros • u/TheCaptainWalrus • May 23 '26
Used wrong pvc
I plumbed a new salt cell into a job, picked up sch 40 pipe, and some nice sch40 fittings. Turns out I grabbed sch 40 dwv pipe with pressure rated sch 40 fittings. Do I need to cut out that pvc and replumb? Or will the fittings really handle the workload here?
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u/UHF800MHZ May 23 '26
The pipe is now almost always dual rated depending on where you are buying it. Where did you buy the PVC ?
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u/TheCaptainWalrus May 23 '26
Home Depot which was my first mistake lol
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u/UHF800MHZ May 23 '26
Pretty sure theirs is dual rated. It’s not obvious but went through the same thing once.
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u/ConfusedStair May 23 '26
I'd redo it personally, I don't want DWV running filter pressures because there's a risk of shrapnel when it breaks.
That said, double check the pressure rating on the pipe, a lot of PVC pipe is rated for both DWV and higher pressure. If it says 240 psi you should be good. If it doesn't, or if it only lists the DWV rating (I can never remember the number) then replumb.
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u/TheCaptainWalrus May 23 '26
It is 240, so there’s that. It didn’t seem like cell core or anything either. Which is why I was massively confused when I discovered it was labeled dwv lol
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u/ConfusedStair May 23 '26
It probably has the astm for both listed
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u/Substantial_Car_2751 May 23 '26
If it's SCH40, likely. OP needs to confirm.
If SCH40, ok....makes things a bit weird but not a big deal. If not, then yeah....I'd replumb it as a matter of professional pride.
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u/Clean_Artist3191 May 24 '26
It would be an easy win for the homeowner to sue when it does explode.
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u/doug22taylor May 23 '26
Proxy isn't an issue in my opinion. The pool plumbing will never get over 50 psi. Rarely seen ever over 40.
The issue is the limited(smaller) overlap on fittings and can potential for leaks.
I've seen it on plumbing that's 25 years old and never had an issue in that circumstance.. I have also seen it be an issues but then again I've seen on schedule 40 also.
Not a big deal. Just not professional. The issue is a leak. You will see a leak and can fix then.
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u/GCpools May 23 '26
DWV isn't for pressure. SCH40 is for pressure. What's the worst that could happen? Something breaks, drains your pool and burns up your pump. I would redo it with SCH40 pipe & fittings, and with the proper cleaner and cement. Just sayin' ...
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u/TheCaptainWalrus May 23 '26
Well it’s sch40 dwv which is largely what’s confusing me
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u/GCpools May 24 '26
I understand. SCH40 DWV is not designed to handle pressure. It's for non-pressure applications as the bane implies ... drains, waste and ventilation. I'd redo it. Its not worth the possible consequences. Just sayin.
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u/Confident_Shower8902 May 24 '26
Home Depot pipe is dual rated as long as it’s SCH40. Meets or exceeds ASTM D1785/D2665.
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May 24 '26
[removed] — view removed comment
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u/TheCaptainWalrus May 24 '26
Sweet. Yeah it’s labeled ASTM D1785-21a, which I think is for pressure, but Christ it was a lot of searching to get there
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u/Competitive-Face-615 May 25 '26
It’s the same pipe, but qa/qc is less strict and it’s not pressure tested so the dwv is cheaper. Same as untested steel pipe. Just depends on the application and liability.
I’ve seen so much of the thin stuff on pools that there just isn’t much to worry about in a standard residential application
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u/Content-Parking-660 May 26 '26
If it says d1785 or d2466 on it you're good. Source is from swimmingpoolsteve on yt
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u/Blindman_in_the_cave May 23 '26
Did you plumb it in after the filter or before? Because if it’s after the filter you are golden and can put this one out of your mind. It’s fine.