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Rule Industries 39 ECO-Switch Automatic Bilge Pump Switch 12V DC

Manufacturer

Rule Industries

<h3>Rule Industries: The Gold Standard in Marine Water Management</h3><p><strong>Rule Industries</strong> has been synonymous with marine pump reliability since 1965. Founded when inventor Clinton Rule set out to solve the all-too-common problem of a leaky boat, the brand grew from a single innovative product into the world's most recognized name in submersible bilge pumps. Today, Rule operates under the Xylem family of water technology brands, but its identity — and its commitment to keeping vessels dry and boaters safe — remains as focused as ever.</p><p>For over five decades, Rule has set the industry benchmark in marine water management. Whether you're a weekend recreational boater, a tournament angler, or a commercial vessel operator, Rule's engineering philosophy is straightforward: build equipment that performs when it matters most. That reputation has earned Rule a place on the spec sheets of boat builders around the globe, with professionals and DIYers alike reaching for the Rule name when reliability is non-negotiable.</p><h3>Electric Bilge Pumps: Rule's Flagship Product</h3><p>The heart of the Rule lineup is its range of <a href="/6623-rule-industries-electric-bilge-pumps-200350">electric bilge pumps</a>. Available in both manual and automatic configurations, Rule bilge pumps are engineered to remove water from the lowest point of a boat's bilge efficiently and reliably. Automatic models feature water-sensing switches that activate the pump as needed, offering hands-free protection without draining the battery. Heavy-duty models incorporate stainless steel shafts, marine-grade blocked wiring, and ignition protection, while the Gold Series pumps are backed by a five-year guarantee — a testament to Rule's confidence in its own craftsmanship.</p><h3>Livewell &amp; Aerator Pumps for Serious Anglers</h3><p>Rule's expertise in water movement extends naturally into the fishing world. The brand's <a href="/6623-rule-industries-livewell-aerator-pumps-200624">livewell and aerator pumps</a> are engineered to circulate and oxygenate water in livewells and baitwells, keeping catch and live bait healthy throughout a long day on the water. Rule's Oxygenator Systems infuse air at the pump impeller to produce micro-fine bubbles that remain suspended longer, maximizing oxygen transfer to your bait or catch. The Tournament Series models feature a cartridge-style motor design that can be removed and replaced quickly — even mid-trip — keeping downtime to a minimum.</p><h3>Blowers, Plumbing &amp; Accessories</h3><p>Rule rounds out its marine offering with a suite of supporting products that complement its pump lineup. The brand's <a href="/6623-rule-industries-blowers-200176">bilge blowers</a> provide ventilation for engine compartments, bilges, galleys, and heads, featuring corrosion-resistant motor housings, front and rear shaft seals, and USCG 183.410 ignition-protection compliance. For system builders and installers, Rule also offers <a href="/6623-rule-industries-plumbing-parts-accessories-200786">plumbing parts and accessories</a> along with <a href="/6623-rule-industries-nylon-pipe-hose-fittings-200724">nylon pipe and hose fittings</a> — the connective tissue that ties a complete marine plumbing system together. With a catalog spanning over 135 products, Rule gives boaters everything they need to build, maintain, and upgrade their vessel's water management systems from a single trusted source.</p><h3>Why Boaters Trust Rule</h3><ul style="list-style:disc"><li>Over 60 years of continuous marine pump manufacturing since 1965</li><li>Submersible bilge pump designs trusted by boat builders from the factory</li><li>Automatic and manual models to suit every vessel type and size</li><li>Products engineered to meet rigorous commercial and recreational standards</li><li>Part of the Xylem global water technology portfolio</li><li>Wide availability through marine dealers across the US, Canada, Australia, UK, and beyond</li></ul>

Part Number

39
09/16/2036 9:45 PM
Sale Price

$111.59

In Stock (9)

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Usually delivered within 2 days

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Product Details

The Rule Industries 39 ECO-Switch is an air-operated automatic bilge pump control switch designed as an environmentally responsible alternative to traditional mercury-based float switches. Using simple air pressure mechanics, this automatic bilge switch reliably activates your bilge pump without any submerged electrical connections.

As bilge water rises, air compresses inside the attached air tube and triggers the switch to turn the pump on. When the water level drops, the pressure releases and the pump shuts off automatically. The switch is pre-set to activate at 57mm (ON) and deactivate at 25mm (OFF), providing precise bilge management without manual intervention.

Key Features:

  • Mercury-free design — environmentally safe, non-toxic automatic bilge switch operation
  • No submerged electrical connections — all wiring remains out of the water for enhanced safety
  • No moving internal parts — reduces wear and improves long-term reliability
  • Air pressure activation — simple, proven mechanism for consistent automatic operation
  • Maximum current rating: 20 amps
  • Voltage: 12V DC
  • Pre-set switch levels: ON at 57mm / OFF at 25mm
  • Includes 3-meter air tube for flexible bilge installation
  • Switch dimensions: 155mm L × 75mm W × 48mm H (6.10" × 2.95" × 1.89")
  • Bell dimensions: 100mm L × 60mm W × 30mm deep

The Rule 39 ECO-Switch is a dependable drop-in upgrade from conventional bilge float switches, offering improved corrosion resistance and zero risk of electrical short from water contact — ideal for any 12V marine bilge pump installation.

Ordered it, came it good time, was the right one, put in my car, now it's working like a beauty. Couldn't ask for anything different

Great price, fast secure shipping, accurate order fulfillment

shipping was very fast packed well no problems

It was a good product my first one blew up so I needed another

Product delivered as expected and in perfect condition.

No reply to my email with question about the part fitting my vehicle. Since the mfg part # matched I took a chance and ordered.

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