Bronze 17 GPM Centrifugal/Baitwell PumpFeatures:17 GPM flow is ideal for baitwell circulation or any onboard pumping job that needs high GPM flow but relatively low pressureInlet is threaded 3/4" NPTDischarge is threaded 1/2” NPT insideGarden hose adaptor is includedMotor is "Ignition Protected" and has a #316SS shaftContinuous duty mechanical shaft sealCP-30 is identical to CP-20 except that it offers externally replaceable motor brushes