Bilge Monitors & Switches

  1. Seachoice Bilge Pump Switch

    $6.86
  2. Seachoice Universal Series Float Switch - 69792

    $17.09
  3. Attwood 3-Way Bilge Pump Switch - 7615A3

    $19.99
    0
  4. 37% off

    Rule 3-Way Lighted Panel Switch

    $41.99 - $45.99
    $28.69 - $41.99
    0
  5. Attwood Automatic Float Switch - 4202-7

    $28.99
  6. Attwood Float Switch - 4201-7

    $29.99
    2
  7. Rule 2-Way Panel Switch - 49

    $30.99
    0
  8. Seachoice Bilge Pump Control Switch - 19391

    $31.99
  9. Rule 3-Way Panel Switch - 45

    $31.99
    0
  10. 19% off

    Johnson Bilge Pump Control Panel Switch

    $39.99 - $53.99
    $32.39 - $53.99
    1
  11. Aqualarm Heavy Duty Pump Switch - 20090

    $37.99
    2
  12. SHURflo Bilge Switch - 359-111-30

    $37.99
    0
  13. Sensar Marine Bilge Sentry Extension Cable - 6 m (19' 8 7/32") - BSEC6M

    $40.00
  14. Attwood S3 Series Automatic Bilge Switch - 4801-7

    $40.99
  15. Blue Sea Systems Contura Water Resistant Bilge Pump Control Switch Panel

    $42.99 - $153.99
  16. Rule 3-Way Lighted Rocker Panel Switch

    $43.99 - $53.99
    0
  17. Rule Rule-A-Matic Bilge Pump Float Switch

    $43.99 - $46.99
    0
  18. Whale Electric Bilge Switch - BE9003

    $43.99
    0
  19. Seachoice Automatic Bilge Pump Switch - 36152SC

    $46.99
  20. SHURflo Bilge Switch - 359-111-40

    $46.99
    0
  21. Water Witch Submersible Electronic Bilge Pump Switch 101

    $46.99 - $52.99
    2
  22. Aqualarm Pump Counter - 20045-SM

    $48.99
    0
  23. Johnson Ultima Switch - 36303

    $51.99
    2
  24. Aqualarm Bilge High Water Alarm with Detector - 20240

    $56.99
    0
  25. Aqualarm Bilge Pump Cycle Counter - 20045

    $56.99
    1
  26. Rule Rule-A-Matic Plus Float Switch

    $56.99 - $59.99
  27. Water Witch Bilge Pump Switch - 217

    $62.99
    1
  28. Aqualarm Bilge Pump Alarm - 20042

    $63.99
    0
  29. Rule SuperSwitch Bilge Pump Float Switch

    $65.99 - $67.99
    0
  30. Water Witch Submersible Electronic Bilge Pump Switch

    $66.99 - $74.99
    3
  31. Water Witch Audible Bilge Alarm with Mute - BP500RD

    $67.99
    2
  32. Rule Alarm Gauge for High Water Bilge Alarm - M-1507

    $69.99
  33. Whale Electric Bilge Switch with Time Delay - BE9006

    $70.99
    0
  34. Rule ECO Switch

    $78.99 - $83.99
  35. Aqualarm Smart Bilge Pump Switch with Alarm - 20038

    $90.99
    0
  36. Rule High Water Bilge Alarm

    $92.99 - $105.99
  37. Water Witch Bilge Pump Cycle Counter - BC100RD

    $106.99
    1
  38. Johnson Pump Bilge Alert/High Water Level Alarm Panel with Sensor

    $106.99 - $113.99
    0
  39. Groco Bilge Pump Control Kit - AS-100

    $107.99
    0
  40. Osculati Automatic Bilge Pump Switch - 16.609.00

    $108.99
  41. Aqualarm Bilge Supervisor - 20074

    $125.99
    0
  42. Blue Sea Systems 360 Panel Dual Bilge Pump Control - 1522

    $133.99
  43. Blue Sea Systems M2 OLED Digital Bilge Meter - 1842

    $324.99
    0
  44. Sensar Marine Boat Monitor with Bilge Sentry - BMBS700

    $499.00
    1

About Bilge Monitors & Switches

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.

Bilge Monitors & Manual Pump Switches

High water alarms, bilge alarms and gauges, switches, and monitors for control panels are offered to set your mind at ease. Kits from Defender enable boat owners to DIY this special safety feature. A high water alarm is also available that can send cell phone or email notifications.