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Rule Industries 35A Rule-A-Matic Automatic Bilge Pump Float Switch

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

35A
09/12/2036 8:22 AM
Sale Price

$37.38

In Stock (6)

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Usually delivered within 2 days

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Product Details

The Rule Industries 35A Rule-A-Matic is an automatic float switch designed to control submersible bilge pumps drawing up to 14 amps at 12V, 24V, or 32V DC. This reliable bilge pump switch automatically turns the pump on when water reaches 2 inches and shuts it off when the level drops to 3/4 inch, providing hands-free bilge management for any marine application.

Key Features:

  • Removable snap-in base design allows easy switch removal for cleaning, inspection, and servicing
  • Mercury-free snap switch with Silver Tin Oxide (AgSnO2) contacts tested to over 1 million cycles for reliable long-term operation
  • Marine-grade blocked wire with tinned and gasked leads ensures superior corrosion resistance and prevents water entry
  • Moisture-tight seals with resilient rubber grommet for strain relief
  • Larger float design provides increased buoyancy for consistent activation
  • Sealed wiring exits from the top to keep connections dry
  • Can also be used to operate high water alarm systems

Specifications:

  • Maximum current rating: 14 amps at 12V DC, 7 amps at 24V DC, or 6.5 amps at 32V DC
  • Pump activation level: 2 inches (51mm)
  • Pump deactivation level: 3/4 inch (19mm)
  • Compact dimensions: 4.5" L x 1.5" W x 2" H
  • Wire gauge: 16 AWG
  • 2-year limited warranty

The Rule-A-Matic 35A is the world's best-selling float switch, trusted by recreational boaters and commercial fishermen worldwide for its dependable performance and durability in harsh marine environments.

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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Last pump I purchased was defective but I chased the problem in the truck for a long time until I discovered it was a defective pump I purchased and the warranty had run out by that time. It was not purchased from you. Please follow up and I will let you know if tthe pump fixed the problem.

Very quick ordering, however I was unable to use the PayPal function.

Quick and easy - and Amazon payments made it even faster!

Found what I was looking for at a reasonable price. Only suggestion is to show similar items on the page.

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No issues at all and a very good price to boot. What could be better? Will definitely order from them again.

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