952-33 (Wilkins) | 3/4 - 1 Inch | 950 DC First or Second Check Spring And 975 RP Second Check Spring

This is 3/4 to 1 Inch Zurn Wilkins 950 Series Double Check Backflow Preventer First or Second Check Spring And 3/4 to 1 Inch 975 Series Reduced Pressure Zone Backflow Preventer Second Check Spring. | Wilkins | 952-33