Sea Sense Bildge Pump Switch 3/Way

A Sea Sense bilge pump switch 3-way gives you flexible control over your bilge pump system when you need it most. This marine-grade switch is built from high-impact, corrosion-proof nylon thru-hull fittings—the kind of no-nonsense hardware that stands up to saltwater environments and constant use. Whether you're running a center console, cruiser, or any boat with a bilge system, this 3-way switch lets you manage pump operation with the reliability that matters when you're on the water.

The thru-hull design means it installs directly through your boat's hull above the waterline, integrating cleanly into your existing bilge setup. Sea Sense marine components are built for durability in wet, corrosive conditions, so you get years of dependable service without the hassle of rust or degradation. A quality bilge switch is one of those pieces of gear you don't think about until you need it—then you're glad it works.

Available in two sizes to match your hull thickness and installation requirements, this switch fits into any boater's maintenance and upgrade plans. It's the kind of straightforward, functional hardware that keeps your vessel running smoothly and gives you peace of mind on the water.

Key Features

• 3-way switching for flexible bilge pump control
• High-impact nylon construction resists corrosion in marine environments
• Thru-hull design for clean, integrated installation
• Above waterline installation
• Available in two fitting sizes for different hull configurations

Specifications

Frequently Asked Questions

What size bilge pump switch 3-way do I need for my boat?

Sea Sense offers this switch in two sizes: a 1-1/8\" thru-hull fitting and a 3/4\" thru-hull fitting. The size you choose depends on your hull thickness and the existing hole or fitting in your boat. Measure your current setup or consult your boat's documentation to determine which size matches your installation.

Can I install this bilge pump switch below the waterline?

No. This thru-hull fitting is designed for above-waterline installation only. Installing it below the waterline could allow water to enter your boat and defeat the purpose of the bilge system.

Is this switch compatible with my existing bilge pump system?

This is a thru-hull fitting component designed to work with bilge pump systems. Compatibility depends on your boat's current bilge setup and the size of the fitting. Check the model number of your existing switch or pump and compare it to the sizes available (1-1/8\" or 3/4") before ordering.

Will this switch corrode or rust in saltwater?

The high-impact nylon construction is corrosion-proof, making it ideal for saltwater and freshwater marine environments. Unlike metal fittings, nylon resists rust and degradation even in harsh conditions.