Somehow I ended up buying schedule 20 pvc instead of the 40. Didn’t realize it was different until my install was complete. Will the schedule 20 be able to handle the overflow/return? Or should I just redo the entire thing?
Plumbing With Schedule PVC 20
- Thread starter JAMSOURY
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From what I know, Sch. 20 is mainly used for non-water applications (for example your central vac system). I know it would not be rated for the types of pressures that Sch. 40 or 80 are, but whether it will hold in your system is a choice you might have to make. It would most likely be perfectly fine for the overflow piping, but whether it holds with the return might vary on a number of factors.
Up here in Canada, Sch. 20 does not meet the Building Code for water applications so its only used for dry applications.
How large of a system do you have? If the cost is not terrible in replacing with Sch. 40 I would do that, but that's just me.
For what we use it for there really isn’t any pressure. It would be fine. Schedule 40 would give you a tad more insurance in case of possibly being crushed or pulled on. If it puts your mind at ease just replace with schedule 40, it’s cheap enough but I would feel fine with 20.
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If your sump is in the stand below, you'll be just fine. The only pressure is the weight of the water in the return pipe....otherwise it's a non-pressurized system.
