The new guardian system now makes the GS submersible pumps even tougher and longer lasting. The guardian system includes an engineered polymer bearing which is resistant to damage from sand, abrasives and over pumping a well. It has years of field proven reliability and durability in some of the world's toughest submersible pump applications, coalbed methane recovery wells. GS submersibles have long featured one of the most durable stages in the industry. Our floating impeller stack design, made with Noryl® impellers, Lexan® diffusers and stainless steel bowls has proven itself for over 4 decades as a best sand handling design in the industry. When it comes to submersible wells, accept no substitute, install the GS submersible with the guardian system.