This 1 inch boiler trim-out package is used for commercial and residential closed loop hydronic heating systems. The package includes an DUO Vent, air separator, SCV 1/8 inch service check valve, combination fill valve and backflow preventer, RBFF, ET-15 and B911S.

Features & Benefits

• Series 53L is Used for Protection against Excessive Pressure on Domestic Storage Tanks or Tankless Water Heaters
• Furnished with Test Levers
• Relieves Excessive Pressure on Storage Tanks
• Relieves Excessive Pressure on Tankless Water Heaters

Specifications

• Type: Pressure, Poppet
• Inlet Size: 1/2 Inch
• Outlet Size: 1/2 Inch
• End Connection: Male Threaded x Female Threaded
• Body Material: Bronze
• Spring Material: Stainless Steel
• Set Pressure Range: 150 PSI
• Temperature Rating: 210 Deg F
• Pressure Rating: 75 to 150 PSI
• Inclusions/Features: Silicone Disc, Test Lever
• Application: Residential, Commercial, Industrial, Storage Tank and Tankless Water Heater
• Applicable Standard: CSA (Canada and US), NB, ANSI Z21-22/CSA 4.4
Overall Dimension 1-7/8 Inch Width x 3-1/2 Inch Height; Steam Pressure Discharge Capacity 15000 BTU/Hour