Teleflex Proheat #940326K 12 Volt 8.0 Gallon Per Minute Shaft Drive Circulation Pump Ready for 3/4" heater hose. Pumps 8 Gallons Per Minute @ 5' head of heated coolant from your Proheat or other diesel hydronic heater system. For systems with up to 100 total feet of hose. Also perfect for pumping heated coolant from your engine heat exchanger to fan heaters or defrosters on a flybridge. Comes with mounting hardware.