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There's also the option of flexible PVC, sometimes called "SPAflex". It's available in your local home improvement store. It's the same OD as the equivalent sized schedule 40 PVC but it's flexible-ish. It will cement into standard PVC fittings and is a bit more forgiving when fitting your plumbing together. I'd DEFINITELY recommend a section of this stuff coming off your return pump. The flexibility of the PVC does wonders to absorb vibrations and quiet down your return pump. You can join the flexible PVC to rigid schedule 40 PVC via a union joint if needed.
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