FEATURES Size: 3/8". Flow Rate: 55 GPH. Application: Heating. Max PSI: 40 psi. Temperature Range (F): 0°-160°F. Connection Type: Threaded (IPS). Fuels - Suitable for kerosene, No. 1 or No. 2 Fuel Oil. Startup - can be manually bled or primed during start up. Operation - Requires fuel unit to provide vacuum to open and make fuel available. Provides - Protection for line break. Temperature Range 0 to 160 F. Maximum Flow 55 gph. Max. Inlet Pressure 40psi. Ports 3/8" NPT.