Automatic Bilge Switches

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Aqualarm

Aqualarm Heavy Duty Pump Switch

Brand:
Aqualarm

Aqualarm Heavy Duty Pump Switch
Mercury-Free Automatic Electronic Bilge Pump Switch Power: 12 Volt DC, Maximum Draw: 30 Amps Waterproof:, Material: All Plastic and Epoxy Sealed Model #: 20090 Item #: 550550		Features: • Waterproof: All plastic and epoxy sealed • Includes 5 feet of Marine Grade Tinned Wire • Dimensions: 4-1/2" H x 1-3/4" Diameter ... more...

$35.99

List Price: $59.00
Our Price: $35.99

Attwood

Attwood Float Switch

Brand:
Attwood

Attwood Float Switch
Mercury-Free Automatic Float Switch with Integrated Cover Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 12 Amps Converts Existing Bilge Pumps to Fully Automatic Operation Model #: 4201-7 Item #: 500773		Attwood Float Switch Features: • Mercury-free automatic float switch with integrated cover • Compact, low-profile design mounts on any surface from a horizontal up... more...

$29.99

List Price: $40.59
Our Price: $29.99

Whale

Whale Electric Bilge Switch with Time Delay

Brand:
Whale

Whale Electric Bilge Switch with Time Delay
Mercury-Free Automatic Switch with Electric Field Sensor Technology Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 20 Amps Extends Pump Deactivation Time Additional 30 Seconds for Further Drainage Model #: BE9006 Item #: 503236		Whale Electric Bilge Switch Features: • Electric Field Sensor senses water level and automatically controls a 12 or 24 Volt DC bilge pump • Switch turns on when it... more...

$64.99

List Price: $88.32
Our Price: $64.99

Groco

Groco Bilge Pump Control Kit

Brand:
Groco

Groco Bilge Pump Control Kit
Air Pressure Operated Automatic Bilge Switch Nominal Voltage: 12 Volt DC, Max. Current Draw: 20 Amps Switch Activates Bilge Pump by Sensing Changes in Pressure in its Air Tube Model #: AS-100 Item #: 501261		Groco AS-100 Bilge Pump Control Kit Features: • Automatically controls bilge pump based on pressure fluctuations from rising or falling bilge water levels in air bell and tube... more...

$77.99

List Price: $113.00
Our Price: $77.99

Whale

Whale Electric Bilge Switch

Brand:
Whale

Whale Electric Bilge Switch
Mercury-Free Automatic Switch with Electric Field Sensor Technology Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 20 Amps Electric Field Sensor Automatically Senses Water Level and Controls Bilge Pump Model #: BE9003 Item #: 503235		Whale Electric Bilge Switch Features: • Electric Field Sensor senses water level and automatically controls a 12 or 24 Volt DC bilge pump • Switch turns on when it... more...

$42.99

List Price: $55.89
Our Price: $42.99

Blue Sea Systems

Blue Sea Systems M2 OLED (Organic LED) Digital Bilge Meter

Brand:
Blue Sea Systems

Blue Sea Systems M2 OLED (Organic LED) Digital Bilge Meter
Function: Monitors bilge pump activity in up to (4) Bilges Input Voltage: 7-70 Volt DC, Range: 0.3 Watt-1.0 Watt Waterproof: IP66, Easy to Read, Auto-Dimming, Bright LED Display Model #: 1842 Item #: 205043		Features: •The Blue Sea Systems M2 OLED (Organic LED) Digital Bilge Monitor measures essential parameters with adjustable alarms and an auto-dimming display •The M2 Monitors... more...

$304.99

List Price: $353.59
Our Price: $304.99

SHURFLO

SHURflo Bilge Switch (359-111-30) - Open Box

Brand:
SHURFLO

SHURflo Bilge Switch (359-111-30) - Open Box
Mercury-Free Standard Automatic Float Switch Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 12 Amps Remote or Direct Mount, Manual Test Feature Model #: 359-111-30 Item #: 501678OB		SHURflo Bilge Switch (359-111-30) is a Mercury-free standard automatic float switch. It's ignition protected and operates with 12 or 24 VDC. The switch activates the bilge pump when the water level... more...

$28.89

Open Box Price: $28.89

SHURFLO

SHURflo Bilge Switch (359-111-30)

Brand:
SHURFLO

SHURflo Bilge Switch (359-111-30)
Mercury-Free Standard Automatic Float Switch Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 12 Amps Remote or Direct Mount, Manual Test Feature Model #: 359-111-30 Item #: 501678		SHURflo Bilge Switch (359-111-30) is a Mercury-free standard automatic float switch. It's ignition protected and operates with 12 or 24 VDC. The switch activates the bilge pump when the water level... more...

$34.99

Our Price: $34.99

SHURFLO

SHURflo Bilge Switch (359-111-40 )

Brand:
SHURFLO

SHURflo Bilge Switch (359-111-40 )
Mercury-Free Caged Automatic Float Switch Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 12 Amps Impact-Resistant Cage Protects Against Debris and Jamming Model #: 359-111-40 Item #: 501679		SHURflo Bilge Switch Features: • Mercury-free caged automatic float switch • Integrated impact-resistant cage protects against debris and jamming ... more...

$42.99

Our Price: $42.99

Johnson Pump

Johnson Ultima Switch

Brand:
Johnson Pump

Johnson Ultima Switch
Mercury-Free Automatic Switch with Sealed Solid State Electronics Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 20 Amps Automatically Adjusts Between 12 and 24 Volt DC Bilge Pumps Model #: 36303 Item #: 502961		Johnson Ultima Switch ™ Features: • Highly reliable solid-state switch uses no moving / mechanical parts • Digital technology uses patented... more...

$39.99

List Price: $58.42
Our Price: $39.99

Water Witch

Water Witch Submersible Electronic Bilge Pump Switch 101

Brand:
Water Witch

Water Witch Submersible Electronic Bilge Pump Switch 101
Mercury-Free Automatic Electronic Bilge Pump Switch, Includes 32" pigtail Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 15 Amps @ 12 Volts 5-Year Limited Warranty, Exceeds USCG and UL Standards Model #: Multiple Voltage Choices Available Item #: 502734		Features: •The Water Witch Model 101 submersible electronic bilge pump switches offer an affordable, more reliable alternative to the ordinary mechanical float switch, not to mention... more...

$42.99

List Price: From $52.23 To $59.89
Our Price: From $42.99 To $47.99

Water Witch

Water Witch Submersible Electronic Bilge Pump Switch 230

Brand:
Water Witch

Water Witch Submersible Electronic Bilge Pump Switch 230
Mercury-Free Automatic Electronic Bilge Pump Switch, Includes 32" pigtail Nominal Voltage: 12 / 24 Volt DC, Max. Current Draw: 20 Amps @ 12 Volts 7-Year Limited Warranty, Exceeds USCG and UL Standards Model #: Multiple Voltage Choices Available Item #: 502920		The Water Witch Submersible Electronic Bilge Pump Switch 230 allows boat owners to forever rid themselves of the archaic outdated float switch. Features: • No moving parts and requires... more...

$62.99

List Price: From $83.67 To $93.86
Our Price: From $62.99 To $69.99

Water Witch

Water Witch Bilge Pump Switch

Brand:
Water Witch

Water Witch Bilge Pump Switch
Mercury-Free Automatic Electronic Bilge Pump Switch, Includes 30" pigtail Nominal Voltage: 12 Volt DC, Max. Current Draw: 10 Amps Unprecedented 7-Year Limited Warranty, Exceeds USCG and UL Standards Model #: 217 Item #: 500660		Water Witch Automatic Electronic Bilge Pump Switch Model 217 Features: • No moving parts and no adjustments required • Switch not affected by temperature or... more...

$56.99

List Price: $79.58
Our Price: $56.99

Jabsco

Jabsco Hydro Air Bilge Switch

Brand:
Jabsco

Jabsco Hydro Air Bilge Switch
Mercury-Free Air Pressure Operated Automatic Bilge Switch Nominal Voltage: 12 Volt DC, Max. Current Draw: 20 Amps Ultra Reliable and Safe, No Submerged Electrical Components Model #: 59400-0012 Item #: 502456		Jabsco Hydro Air Bilge Switch Features: • Air-operated automatic bilge switch • Diaphragm switch in the switch unit activated by increase of air pressure in air... more...

$62.99

Our Price: $67.99

Jabsco

Rule-A-Matic Bilge Pump Float Switches

Brand:
Jabsco

Rule-A-Matic Bilge Pump Float Switches
Select with or without Fuse Holder Nominal Voltage: 12 / 24 / 32 Volt DC, Max. Current Draw: 14 Amps Detachable Mounting Base for Easy Installation, Inspection and Cleaning Model #: Multiple Models Available Item #: 506495		Rule Rule-A-Matic® Float Switch Features: • Switch turns bilge pump on when water level reaches 2" – turns pump off when water level reaches 3/4" ... more...

$46.99

Our Price: From $46.99 To $47.99

Rule

Rule-A-Matic Plus Float Switch

Brand:
Rule

Rule-A-Matic Plus Float Switch
Mercury-Free Automatic Float Switch with Integrated Cover Nominal Voltage: 12 / 24 / 32 Volt DC, Max. Current Draw: 20 Amps Detachable Mounting Base for Easy Installation, Inspection and Cleaning Model #: 40A Item #: 500055		Rule Rule-A-Matic® Plus™ Float Switch Features: • Strong, fully integrated impact-resistant cover protects against debris and jamming • Switch turns bilge... more...

$56.99

Our Price: $56.99

Rule

Rule SuperSwitch Bilge Pump Float Switches

Brand:
Rule

Rule SuperSwitch Bilge Pump Float Switches
Select with or without Fuse Holder Nominal Voltage: 12 / 24 / 32 Volt DC, Max. Current Draw: 20 Amps Serves up to (3) Outlets with Exceptional Flow & Consistent Water Pressure Model #: Multiple Models Available Item #: 506496		Rule SuperSwitch™ Float Switch Features: •Now backed with a 5 year warranty! • Designed with larger float for increased buoyancy • Switch turns bilge... more...

$62.99

Our Price: From $62.99 To $69.99

Top

Automatic Bilge Pump Float Switches

Bilge pump switches come in a variety of styles to suit any application. From a basic float style switch to field detector cells and air pressure switches, Defender offers just about any switch you may need.

How does a float switch work?

Water finds its way into every boat and the boat owner has to get it out. Bilge pumps take care of that chore but offer challenges of their own. Pumps can burn up when dry and will draw off all of your battery power if given the chance. Enter the automatic bilge pump switch and the bilge pump float switch is the most popular with its simple mechanics. The water gets high, the switch gets high, and signals the bilge pump to switch on. The float switch drops with the water level and cuts the pump off.

Can I DIY my bilge pump switch installation and wiring?

Sure! Defender's line of automatic bilge pump switches is offered complete with a shot of wire and specs to 12, 24, or 32-volt service. Several switches fit detachable mounting plates for easy installation. Other switches can be mounted at an angle. Spec out the location of your automatic bilge pump switch and check out all of the options Defender has to offer before you buy.

And the best automatic bilge pump switch is...

By far the most well know the switch is a marine float switch. Defender offers floats switches, protected float switches, and detachable float switches. Defender also offers switches that are time delayed, air-operated, sensor-operated, and prompted by changes in air pressure. Small spaces, oily bilges, and specialized wiring all play a part in which switch from Defender is the best.