Powered by CentriPro 4" motors for dependable operation and long service life. Stainless Steel Construction provides strength and corrosion resistance. Noryl® impellers and Lexan® diffusers deliver excellent abrasion resistance. Floating Impeller Stack has proven itself for over 50 years as a superior sand handling and durable pump design. The proprietary engineering polymer bearing is strong and resistant to abrasion and wear. Cast stainless steel discharge head with built in stainless steel check valve. Two cast-in safety line loops for installer convenience.