Barnes SHUR-Switch™ sump pumps feature low cost, high performance benefits from a rugged, heavy duty design. All of our sump pumps feature dual ball bearing design and thermoplastic impellers. Barnes SU33 sump pumps feature an innovative magnetic vertical float switch under a protective cover to prevent hang ups. All Barnes sump pumps are robustly designed for long operational life and dependable service. They are further enhanced by a stainless steel shaft and heavy duty seal. Barnes sump pumps save time and replacement costs because they are interchangeable with competing sump pump brands.