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Rule Industries 37A SuperSwitch Mercury-Free Marine Bilge Pump Float Switch

Manufacturer

Rule Industries

<h3>Rule Industries: Five Decades of Marine Pumping Excellence</h3> <p>Since 1965, Rule Industries has been a trusted name in marine solutions, setting the industry standard with high-performance submersible bilge pumps. As part of Xylem's portfolio of water technology brands, Rule has built an exceptional reputation among commercial fishermen, recreational boaters, and marine professionals who demand equipment that performs when it matters most. As marine technology developed, Rule stayed ahead, delivering pump systems that became the go-to choice for commercial fishermen and recreational boaters alike.</p> <p>Every boat owner faces the same challenge: water intrusion is inevitable. Whether from rain, splash-over, or slow leaks, managing bilge water is critical to vessel safety and longevity. That's where Rule's engineering expertise becomes essential. Rule pumps have built their reputation in the field—through storms, mechanical failures, and those high-pressure situations where reliable water removal is the difference between a close call and a catastrophe.</p> <h3>Comprehensive Marine Water Management Solutions</h3> <p>Rule's product lineup centers on one core mission: keeping vessels dry and operational in any condition. Their <a href="/6623-rule-industries-electric-bilge-pumps-200350">electric bilge pumps</a> form the foundation of this commitment, offering flow rates from 360 GPH to over 3800 GPH to match any vessel size and water accumulation challenge. These pumps feature marine-grade construction designed to withstand salt spray, temperature extremes, and constant moisture exposure that would quickly destroy lesser equipment.</p> <p>Understanding that automation is key to peace of mind on the water, Rule offers multiple control solutions. Their <a href="/6623-rule-industries-float-switches-200426">float switches</a> provide reliable automatic activation when water levels rise, eliminating the need for constant monitoring. For comprehensive vessel protection, Rule's <a href="/6623-rule-industries-bilge-pump-switches-alarms-200163">bilge pump switches and alarms</a> deliver layered safety systems that alert operators to water intrusion while automatically managing removal. Rule Automatic Bilge Pumps feature built-in sensors that check for water every 2.5 minutes, ensuring continuous protection without manual intervention.</p> <p>Beyond bilge management, Rule provides specialized solutions for other marine applications. Their <a href="/6623-rule-industries-air-pumps-adaptors-200078">air pumps and adaptors</a> support livewell systems critical for fishing operations, while their extensive range of <a href="/6623-rule-industries-plumbing-parts-accessories-200786">plumbing parts and accessories</a> ensures that complete fluid management systems can be built, maintained, and upgraded using Rule components.</p> <h3>Engineering That Stands Up to Marine Environments</h3> <p>Rule's commitment to quality and durability makes their pumps the first choice among do-it-yourselfers and professional installers alike. The brand's pumps undergo rigorous testing to ensure they deliver rated flow rates even under challenging conditions. Their cartridge-style pump designs allow for easy maintenance—when debris clogs the strainer or impeller, the motor cartridge can be quickly removed for cleaning and reinstalled, minimizing downtime.</p> <p>High-quality materials handle salt spray, temperature swings, and constant moisture without breaking down, designed to keep working in conditions that destroy lesser equipment. This durability translates to real-world reliability for boaters who need equipment they can count on when far from shore, facing rough seas, or leaving their vessels unattended.</p> <h3>Why Marine Professionals Choose Rule</h3> <p>Rule's position in the marine industry reflects decades of proven performance. The brand's pumps are specified by boat manufacturers, recommended by marine technicians, and chosen by vessel owners who understand that bilge pump failure isn't just an inconvenience—it's a serious safety risk. From small recreational craft to larger commercial vessels, Rule provides scalable solutions backed by widespread availability through marine dealers and distributors worldwide.</p> <p>Whether you're replacing a worn pump, upgrading to automatic operation, or building a new vessel, Rule Industries delivers the marine pumping technology that keeps boats dry, protected, and ready for whatever conditions they encounter on the water.</p>

Part Number

37A
06/27/2036 11:56 AM
Sale Price

$71.61

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Rule Industries 37A SuperSwitch is a heavy-duty, mercury-free bilge pump float switch built for automatic on/off bilge pump control in the most demanding marine environments. Engineered to handle bilge pumps drawing up to 20 amps, this reliable snap-action switch activates when water reaches 2" and shuts off once the level drops to 3/4", keeping your bilge dry with minimal cycling.

Featuring an environmentally responsible, mercury-free snap switch mechanism tested to over one million use cycles, the 37A SuperSwitch delivers dependable performance for commercial and recreational boaters alike. The switch is ignition protected and carries CE approval, making it suitable for use in fuel-vapor environments.

Key Features:

  • Mercury-free snap switch design — tested to over 1 million cycles for long-term reliability
  • Larger float for increased buoyancy and reduced rapid on/off cycling
  • Marine-grade 14 AWG blocked wire — 28" leads with moisture-tight seal and grommet for strain relief and superior corrosion resistance
  • Removable snap-in base for easy installation, cleaning, and servicing
  • Multi-voltage compatible — works with 12V, 24V, and 32V DC systems
  • 20-amp capacity at 12V (10A at 24V, 6.5A at 32V)
  • Can also be used to operate high water alarm systems
  • Ignition protected with CE approval
  • 5-year limited warranty

Specifications:

  • Voltage: 12 / 24 / 32 VDC
  • Max Amp Draw: 20A (12V), 10A (24V), 6.5A (32V)
  • Wire Size: 14 AWG / Wire Length: 28"
  • Dimensions: 5" L x 2" W x 2" H
  • UPC: 042237095497

The Rule 37A SuperSwitch is a trusted choice among commercial fishermen and serious boaters who demand a float switch that performs reliably when it matters most.

We saw this exact product at Bass Pro Shop for 200 and only paid less than 120.00 on this site.

perfect fit ,Fast shipping

Service was great. I received the cleats faster than expected.

The online purchasing system is very efficient. I had an issue with the delivery times, and the company quickly corrected the situation to my satisfaction.

Order process was quick and easy

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