1/4 lb. spring, 1½"slip x slip
Waterway Check Valve
Specifications:
Air Blower Check Valve Type - Spring
Plumbing Connection Size "A" - 1½"
Plumbing Connection Type "A" - Slip
Plumbing Connection Size "B" - 1½"
Plumbing Connection Type "B" - Slip with Union
Spring Tension - ¼ lb.
Check Valve Application - Air
Air Blower Fitting Type - One Union Check Valve