The Rule 500 Pump Has Special Functional Features While Maintaining Minimal Size And Price. Particularly Popular In Smaller Boats, Rule 500 Pumps Are Unrialed In Power And Longeity. Rule Submersible Bilge Pumps Hae Been The Industrial Quality Model For Decades. They Are The First Choice Of Yachtsmen And Professional Fishermen Worldwide. Rule Industries Hae Introduced More Innoations In Pump Design Than Any Other Manufacturer And Are Proud To Offer The Widest Range Of Bilge Pumps In The World.