GROCO Bronze 17 GPM Centrifugal/Baitwell Pump [CP-20 12V]Bronze 17 GPM Centrifugal Baitwell Pump Features: 17 GPM flow is ideal for baitwell circulation or any onboard pumping job that needs high GPM flow but relatively low pressure Inlet is threaded 3 4" NPT Discharge is threaded 1 2 NPT inside Garden hose adaptor is included Motor is "Ignition Protected" and has a #316SS shaft Continuous duty mechanical shaft seal CP 30 is identical to CP 20 except that it offers externally replaceable motor brushes