The Redi-Flo4® Variable Performance Pumps are submersibles constructed of virgin Teflon® and stainless steel to handle the rigors of contaminated groundwater monitoring and continuous operation in remediation applications. TheRedi-Flo4® Variable Performance Pumps are designed to operate in 4 inch and larger wells to depths of 524 feet. TheRedi-Flo4® pumps have a built-in check valve to prevent back-flow in the well after the pump is shut down. A user-friendly cable guard aids in the ease of variable length motor lead installation.