Rule Industries 40A Rule-A-Matic Plus Automatic Bilge Pump Float Switch

Rule Industries

<h3>Rule Industries: The Trusted Name in Marine Pumping</h3><p>Few names carry as much weight on the water as <strong>Rule Industries</strong>. The brand traces its origins to a talented engineer named Clinton Rule, whose firsthand frustration with a leaky boat drove him to redesign the bilge pump from the ground up. That practical, problem-solving spirit became the foundation of a brand that would go on to dominate the marine pump market in the United States and around the world.</p><p>Over the decades, Rule expanded well beyond its roots, growing into a comprehensive manufacturer of marine water-management solutions. In 1998 the company was acquired by ITT Industries, and it is today part of <strong>Xylem Inc.</strong>, a global water technology leader spun off from ITT in 2011. Even under that larger corporate umbrella, Rule's product identity has remained sharply focused: purpose-built marine pumps that boaters can stake their safety on.</p><h3>Electric Bilge Pumps — The Core of the Rule Lineup</h3><p>Rule's flagship product category has always been the electric bilge pump. These submersible workhorses are engineered specifically for marine environments — a crucial distinction from residential sump pumps — and are designed to sit at the lowest point of a vessel's bilge, automatically activating when water reaches a set level. Rule automatic bilge pumps check for water every 2.5 minutes and activate at defined thresholds, quietly managing water ingress so boaters can focus on the water ahead instead of the water below. The lineup spans a wide range of capacities, from compact 500 GPH units ideal for small day boats to high-output models suited for larger offshore craft, ensuring there is a <a href="/6623-rule-industries-electric-bilge-pumps-200350">Rule bilge pump</a> matched to virtually every hull size and application.</p><p>Rule-Mate automatic models incorporate optimized impeller designs, built-in thermal cut-off protection, and automatic float switches — engineering details that translate directly into longer service life and safer operation in demanding conditions. Corrosion-resistant construction means these pumps hold up whether you're running in freshwater lakes or saltwater bays.</p><h3>Livewell &amp; Aerator Pumps for Anglers</h3><p>For fishing enthusiasts, bait health can make or break a day on the water. Rule's livewell and aerator pumps are purpose-designed to keep bait and catch alive through efficient water circulation and oxygenation. The Tournament Series livewell pumps feature a patented rotatable base — allowing the discharge nozzle to be positioned at any angle — and a push-button motor cartridge system that lets anglers swap out the motor quickly, even in tight spaces or mid-trip. Rule's Oxygenator systems infuse air at the pump impeller to generate millions of micro-fine bubbles, which remain suspended in the water longer for superior aeration. Whether you're running a 10-pound baitwell or a high-capacity tournament livewell, Rule offers models scaled to the task.</p><h3>Shower &amp; Sink Drain Pumps and Plumbing Accessories</h3><p>Cabin comfort aboard a cruising vessel depends on reliable gray-water management. Rule's shower and sink drain pumps bring the same engineering rigor found in the brand's bilge pump lineup to the challenge of removing gray water from onboard showers and sinks. The automatic shower drain sump boxes feature sealed clip-on lids to prevent unwanted splashback, friction-fit pump and switch assemblies that require no tools for servicing, integrated backflow prevention, and threaded inlet port fittings in multiple sizes for flexible installation configurations. Rounding out the marine water-management ecosystem, Rule also offers plumbing parts and accessories — the fittings, check valves, switches, and ancillary components that tie a complete onboard plumbing system together.</p><h3>Why Boaters Choose Rule</h3><ul><li>Decades of proven performance in both recreational and small commercial marine markets</li><li>Wide GPH capacity range to match any vessel size</li><li>Automatic operation with reliable float-switch technology</li><li>Corrosion-resistant materials engineered for saltwater environments</li><li>Tool-free serviceability on many pump and drain box models</li><li>Backed by the engineering resources of Xylem, a global water technology leader</li></ul>