Powered for Continuous Operation-All ratings are within the working limits of the motor as recommended by the motor manufacturer. Pump can be operated continuously without damage to the motor;Sand Handling Design: Our face clearance, floating impeller stack has proven itself for over 50 years as a superior sand handling, durable pump design;FDA Compliant Non-Metallic Parts: Impellers, diffusers and bearing spiders are constructed of glass filled engineered composites. They are corrosion resistant and non-toxic;Discharge Head: Cast 303 stainless steel for strength and durability. Two cast-in safety line loops for installer convenience;Motor Adapter: Cast 303 stainless steel for rigid, accurate alignment of pump and motor. Easy access to motor mounting nuts using standard open end wrench;Stainless Steel Casing: Polished stainless steel is strong and corrosion resistant;Hex Shaft Design: Six sided shafts for positive impeller drive;Engineered Polymer Bearings: The proprietary, engineered polymer bearing material is strong and resistant to abrasion and wear. The enclosed upper bearing is mounted in a durable Noryl bearing spider for excellent abrasion resistance;Check Valve: Screws into discharge head from the top, easily removed for drain-back systems or replacement without disassembling the pump. Spring loaded, o-ring poppet design for positive seal in all conditions;Crimped Design: For strength, will not separate in the harshest conditions;Quad-Lock technology: 4 Permanently roll-formed grooves provides the durability and sealing needed in the toughest conditions