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Rule Industries 35FA Rule-A-Matic Bilge Pump Float Switch with Fuse Holder

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

35FA
09/16/2036 8:16 PM
Sale Price

$43.72

In Stock (5)

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Usually delivered within 2 days

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Product Details

The Rule Industries 35FA Rule-A-Matic Float Switch is the world's most trusted automatic bilge pump float switch, relied upon by recreational boaters and commercial fishermen alike. Designed for automatic on/off bilge pump control, it activates the pump when water rises to 2" (51mm) and shuts the pump off once the level drops to 3/4" (19mm), helping to keep your bilge dry without manual intervention. This model includes an integrated inline fuse holder on the positive wire, protecting both the switch and pump from electrical damage in the event of a fault.

Key Features:

  • Mercury-free snap switch using Silver Tin Oxide contacts, tested to over one million cycles for long-term reliability
  • Removable base with convenient snap-in design for easy cleaning, inspection, and servicing
  • Extra-large float chamber for increased buoyancy and consistent water level detection
  • Integrated waterproof inline fuse holder — no need to add a separate fuse to the battery positive wire
  • Marine-grade "blocked" wire leads with tinned conductors and sealed exits to prevent water intrusion and resist corrosion
  • Rubber grommet strain relief where wiring exits the body, keeping connections dry
  • Switch design prevents rapid on/off cycling to protect the bilge pump motor
  • Compatible with pumps drawing up to 14 amps
  • Operates on 12V, 24V, or 36V DC systems
  • Can also be used to trigger high-water alarm systems
  • Backed by a 2-year limited warranty

The Rule 35FA is a dependable, environmentally responsible upgrade over older mercury-based switches, making it the go-to automatic bilge float switch for freshwater and saltwater vessels of all sizes.

Products specifications

Dimensions

1 3/4" Width x 2 5/8" Height x 5" Length

Type

Float

Warranty Details

Two Years

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