Manufacturer Name: Maxitrol Product Number: RV81-1 1/2 OEM Part Number: RV81-1 1/2 Product Description: 1.5" Csa 1/2# Max1#In 3-6"Out Weight:4.34lbs/1968.59g The Maxitrol RV81-1 1/2 1.5 Inch CSA 1/2 Max 1 In 3-6 Inch Out is a high-quality gas pressure regulator required for accurate control of gas flow in HVAC systems. This regulator ensures that the gas pressure entering the s... https://www.partshnc.com/rv81-1-12-maxitrol-15-csa-12-max1in-3-6-out