CP20BBBRAS Heat Booster Pump - Brass Head $325.40 Quantity discounts available QuantityPrice Quantity -+ Add to Cart Details 17 GPM flow is ideal for any pumping job that needs high GPM flow but relatively low pressure.Inlet is threaded 1" NPT.Discharge is threaded 1” NPT in... Details Back Details17 GPM flow is ideal for any pumping job that needs high GPM flow but relatively low pressure.Inlet is threaded 1" NPT.Discharge is threaded 1” NPT inside. Motor is "Ignition Protected" and has a #316 SS shaft.Continuous duty mechanical shaft seal