Marine Air Conditioning Self-Priming Circulation Pump - 115VAC, 4.5GPM, 50PSI Bypass, Run-Dry Capable EDM ValvesShurflo will keep your air conditioning running. Air locking often occurs when you lower your boat into the water. Pentair Shurflo Self-priming Circulation Pumps help prevent air locking and keep your air conditioning system up and running. Compatible with all types of boats that are trailerable or not constantly in the water.Specifications:4.5 GPM115VSelf-priming50 psi bypassEPDM valvesBenefits:Designed with automatic demandOperates quietlyIncludes thermal protectionCan run dry without damageMounts in any positionRecommended Accessories for 5/8" Hose:One inlet strainer 255-215Two 5/8" hose barb swivel elbows 244-3936One 5/8" straight 244-2936