Magic Plastics Inline Check Valve 20in Slip Socket PVC 0821 20

Magic Plastics Inline pool and spa plumbing water check valve, 2.0 slip socket with a 12 lb internal spring, Magic 0821 20. Used to prevent cycling or backflow of water within a 2 PVC pipe. Installs in one direction only, to keep water moving in one direction only. Often used in front of the pump or heater, or before a chlorinator, to prevent back draining when the system is off.

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