Ultra Bilge Pumpswitch | Jupiter Boat Supply

ULTRA Bilge Pumpswitch™

Unmatched Reliability for Your Boat's Safety

When you’re out on the water, your bilge system is one of your boat’s most critical safety components. The ULTRA Bilge Pumpswitch provides precise, automatic activation of your bilge pump when high water levels are detected—so you can focus on navigating, not worrying.

Each ULTRA Bilge Pumpswitch™ is hand-crafted with sealed, moisture-proof construction to deliver years of dependable performance in harsh marine environments. Designed for maximum reliability and durability, these switches ensure your bilge pump operates flawlessly when it matters most.

Automatic high-water detection for instant pump activation
12-volt configuration, ideal for small boats and sailboats
Durable, hand-built design with sealed housing for moisture protection
Corrosion-resistant construction for saltwater environments
Available in Mini, Junior, and Senior models to fit your setup
Also offered in 24/32-volt versions for larger systems

ULTRA Bilge Pumpswitches™ — engineered to perform when your safety depends on it.

How It Works

ULTRA Bilge Pump Switches use advanced solid-state technology to detect rising water levels and activate your pump automatically—without floats, moving parts, or maintenance. When water clears, the switch shuts off instantly, keeping your vessel safe and dry every time.

Detects rising water levels automatically.

Activates the bilge pump instantly.

Turns off once water is cleared.

Product models

From compact recreational boats to heavy-duty commercial vessels, ULTRA Bilge Pump Switches deliver reliable performance in any environment. Explore our range of models designed to match your boat’s size, power needs, and installation requirements.

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Why ULTRA Bilge Pump Switches Last For Decades

Four key design features make these switches exceptionally dependable:

Hermetically Sealed Switch

A magnet within the float activates the switch, which is fully sealed to prevent moisture intrusion.

Protected Float Design

The float is enclosed within a cylinder, shielding it from debris, with only small openings at the bottom to let water in.

Waterproof Wiring

Long, pre-connected leads are sealed at the switch end and supplied with crimp connectors and heat-shrink covers, allowing secure connections away from the bilge.

Superior Construction

Every component reflects high-quality materials and precise assembly for long-term performance.

Warranty Wiring Instructions

Trusted by Boaters Worldwide

See why boat owners, mechanics, and marine professionals rely on ULTRA Tef-Gel for lasting protection against corrosion, seizing, and saltwater wear.

I love this stuff!

I live on a boat, where corrosion is viral, especially on aluminum/stainless steel connections. Nothing I’ve coated with this has corroded, even after many years of salt water splashes. Makes maintenance into a relatively easy chore instead of a fight to the death with fasteners.

Stephen A. O’Brien

Very good product

Used it to attach Spinlock cam cleats with stainless steel screws to the aluminum plate below the deck combing. Expensive, you don’t need a lot.

A. Robert Gelb

Top of the line product for Marine/water/application applications

No need to get anything else anymore for all the metal parts used in marine applications especially screws, fishing reels (everything metal), fishing rod guides. Note: This is a thick gel it tends to hold up a little but I have not seen much a problem on bait cast reels gears and spinning reels. There is or was also a lighter Tef-Gel version but I have not found it around anymore. If you can get the lighter version then it may work better on application to moving parts as it is not so sticky. The gel is very sticky and will stick to hands, clothes, but will wash out with some hand soap from hands. The only part I’m stating as a loss is that it does not come with the useful and pictured application brush. I wouldn’t look for something else it’s a great product. read more...

Mr Jan Kovar

There is nothing better

For a salty marine environment where corrosion is viral. I am working on sailing boats and every time I use Tef-Gel on aluminum/stainless steel connections, I realize that I am doing that for the person who has to take it apart. Instead of cursing, drilling and tapping you just take the bolts out again. On my own boat maintenance became a lot easier and I hope the next time I have to take something apart, that the one who mounted it, used Tef-Gel. read more...

Rudy Schellingerhout

Perfect for Fishing Reel Drag Washers

I have the 20cc syringe which I purchased last year (that size doesn’t seem to be available right now). I’ve been looking for a suitable grease to use on my fishing reel drag washers. This lubricant is perfect to use on any carbon fiber drag washer. Just a light coating on each side of the washer does a great job if applied properly. It’s much thicker and stickier then any of the other lubes that I’ve tried for this application (“Cal’s, “Penn Blue Grease” or “Shimano Grease”)….very similar to the stuff that came with the old Newell reels. A little goes a long way. read more...

TheReader

Great for squeaky bushing too

I use this to lube the polyurethane suspension bushings on my truck. Completely keeps everything from squeaking. Great product to have in every garage.

Patrick G

Must have for aluminum boats

100% satisfied; delivered and performed as advertised. For an aluminum boat, always have Tef-gel handy.

Amazon Customer

Indispensable for a marine mechanic

If you’re joining different metals, like aluminum with Stainless steel bolts, this stuff is indispensable. Expensive for the quantity, but a little goes a long way. Nice applicator

Paul Manning

Excellent product!

I have been using it for about 10 years in the marine environment it is amazing. I have not found anything else like it on the market. This is a must-have item for saltwater use.

jpflyrod

Really Works!

I have been using this product for years on my ocean aluminum catamaran to prevent corrosion between the aluminum boat and stainless screws due to dissimilar metals. Screws come right out when needed!!

BBugg

Great way to prevent electrolysis galling of dissimilar metals

This stuff really works. Put it on every bolt that needs to come off at a later date. Prevents electrolysis galling.

Uncle Devo

Frequently Asked Questions

Find quick answers to the most common questions about ULTRA Bilge Pumpswitch — its uses, compatibility, installation, and long-term performance in marine environments. For additional inquiries or specific concerns, contact us and our team will be happy to assist you.

The ULTRA Bilge Pumpswitch automatically activates your bilge pump when the water level rises and turns it off once the bilge is pumped dry. It uses a reliable mechanical float to sense rising water and protect your boat from flooding or pump burnout.

The ULTRA Pumpswitch stands out due to its rugged, marine-grade construction and durable design. Unlike many traditional float switches, it’s built with:

A durable, sealed float mechanism
No mercury or hazardous materials
All stainless-steel and non-corrosive components
Waterproof construction designed for long-term reliability
Resistance to oil, fuel, debris, and harsh bilge environments
Positive-action switching with no electronic timer delays
The result is a switch that is highly reliable, safe, and built to outlast standard bilge pump switches.

Yes. ULTRA Pumpswitches are compatible with any 12V or 24/32V DC bilge pump, as long as the pump is within the switch’s amp rating. They work with nearly all major marine pump brands and come with wiring instructions printed directly on the switch for easy installation.

Installation is simple and similar to most mechanical float switches:

Wire the switch in-line with your bilge pump following the diagram on the switch body.
Test the switch to confirm proper float movement and pump activation.
Mount the switch vertically in the bilge using the included stainless hardware.
Ensure the float has free movement and sits at the desired activation height.
No calibration or electronic settings are required—just mount, wire, and test.

Yes. ULTRA Pumpswitches are engineered specifically for harsh marine environments, including saltwater. Features that support marine durability include:

Non-magnetic stainless-steel parts
Heavy-duty, impact-resistant casing
Fully sealed and water-resistant construction
Materials that resist corrosion, oil, fuel, and debris
They are designed to perform reliably in both saltwater and freshwater bilges.

Yes. Every ULTRA Bilge Pumpswitch comes with a warranty, reflecting its durability and proven long-term performance.

ULTRA bilge Pumpswitch™