Zoeller 30-0041 50 psi PVC 2-Port Check Valve, 1-1/2″

Amazon.com Price: $31.98 (as of 26/09/2023 11:32 PST- Details)

1/2 lbs (0.23 Kg) spring magically eliminates water hammer
Reduces motor and pump noise from plumbing system
Designed for both horizontal and vertical usage