Shurflo Standard Automatic Bilge Pump Switch 359-111-30, 12/24V, 3ft Tinned Wire

The Shurflo Standard Automatic Bilge Pump Switch (part number 359-111-30) is a float-style switch that automatically triggers your boat's bilge pump during water intrusion, so the bilge is evacuated without you needing to flip a manual switch. The switch activates when water rises to 1-3/4 inches and deactivates once the level falls back to 3/4 inch, giving a reliable on/off cycle that protects against nuisance running while still catching rising water early. It comes with a 3 foot tinned wire assembly suited to the corrosive marine environment, and it supports either remote or direct mounting depending on how your bilge compartment is laid out. The switch is ignition protected and built with non-mercury internals, and Shurflo recommends mounting it horizontally for the most consistent performance. Internally it uses a mechanical, normally-open contact design with screw terminal connections, rated for 12 amps at 12/24 VDC, and it carries an IP66 ingress protection rating along with UL listing for use in wet bilge environments. It is backed by a 3 year manufacturer's warranty. This switch is intended to work alongside your existing bilge pump as the automatic trigger, not as a pump itself, and it is a straightforward retrofit or replacement for boat owners upgrading from a manual-only bilge setup.

Specifications

• Brand: Shurflo
• Manufacturer Part Number: 359-111-30
• Type: Float Switch (Automatic Bilge Pump Switch)
• Voltage: 12/24 VDC
• Max Amps: 12.0A
• Activation Level (On): 1-3/4 inches
• Deactivation Level (Off): 3/4 inch
• Wire Assembly Length: 3 feet
• Wire Type: Tinned
• Mounting: Remote or direct mounting, panel mount
• Recommended Mounting Orientation: Horizontal
• Operation Mode: ON-OFF
• Contact Type: Normally Open
• Connector Type: Screw Terminals
• Switch Type: Mechanical
• Circuit Type: 1-way
• Number of Positions: 2
• Material: Plastic
• Dimensions: 4.4 inches x 3.6 inches x 1.3 inches
• Operating Temperature Range: 33 to 180 degrees Fahrenheit
• Ingress Protection Rating: IP66
• Certification: UL Listed
• Mercury Content: Non-Mercury
• Warranty: 3 year manufacturer's warranty
• Weight: 0.4625 pounds
• UPC: 752324010615

Frequently Asked Questions

What does the Shurflo 359-111-30 bilge pump switch do? The Shurflo 359-111-30 is an automatic float switch that turns your bilge pump on when water rises to 1-3/4 inches and turns it off once the level drops to 3/4 inch, so the pump runs only when needed.

Does this switch work with any bilge pump? Yes, the 359-111-30 is designed to work in conjunction with your boat's existing bilge pump as the automatic trigger; it is a separate switch component, not a pump itself.

What voltage and amperage does this switch handle? This float switch operates on 12/24 VDC and is rated for a maximum of 12.0 amps.

How long is the wire on the 359-111-30 switch? It comes with a 3 foot tinned wire assembly, which resists corrosion in the marine bilge environment.

How should the switch be mounted? Shurflo recommends mounting the 359-111-30 horizontally for maximum performance, and it supports either remote or direct mounting depending on your bilge layout.

Does this bilge switch contain mercury? No, the Shurflo 359-111-30 is a non-mercury float switch.

What are the dimensions of this switch? The Shurflo 359-111-30 measures 4.4 inches by 3.6 inches by 1.3 inches.

Is this switch rated for wet, submerged use? It carries an IP66 ingress protection rating and is ignition protected, making it suitable for the wet conditions found in a boat's bilge.

What is the warranty on this part? The 359-111-30 is backed by a 3 year manufacturer's warranty from Shurflo.

How much does the switch weigh? The Shurflo 359-111-30 automatic bilge pump switch weighs 0.4625 pounds.

What type of electrical contact does this switch use? It uses a mechanical, normally-open contact with screw terminal connections, wired in a 1-way circuit configuration.

Is there a difference between this and Shurflo's caged switch? The 359-111-30 is Shurflo's standard automatic switch design, distinct from Shurflo's caged version which uses a snap-into base and includes a manual test feature; the two are separate part numbers.