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Water / Waste Holding Tanks

Flexible Water & Holding Tanks Tank Accessories Rigid Water & Holding Tanks Tank Monitors

101 Listed

  1. Vetus Universal Tank Float Sensor

    $211.18 - $311.08

  2. LIST Single-Level Waste Tank Alarm - 3/4 Alert - TM-132111

    $209.85
    0

  3. SCAD TM2 Tank Monitor for Two Tanks - 10041

    $205.78
    1

  4. Plastimo Rectangular Flexible Water Tank - 26.4 Gal - 70965

    $196.36
    4

  5. Maretron NMEA 2000 Tank Temperature Immersion Probe - TP-IP-1

    $196.33
    0
  6. 56% off

    Oceanic Systems Deck-Mounted Water Gauge - 5250-W

    $439.33
    $189.60
    0

  7. Raritan Tank Sensor Module Kit - 15101

    $167.98

  8. Plastimo Square Flexible Fresh Water Tank - 13.2 Gal - 70963

    $154.50
    1

  9. Dometic DVF Holding Tank Vent Filter Replacement Cartridge - 309311004

    $154.48
    7

  10. Raritan Tank Sensor - Float Style - STCFL

    $145.03
    0

  11. Victron Energy GX Tank 140 System Monitoring - BPP920140100

    $133.73
    1
  12. 63% off

    Oceanic Systems 4-20mA Tank Level Adaptor - 4291

    $365.08
    $132.30
    0

  13. Veratron Level Sensor Single Station with Seal Kit - 226-801-015-001G

    $127.57
    0

  14. Veratron OceanLink Fresh Water Gauge - 52 mm (2 1/16")

    $122.10
    0

  15. Todd Fresh Water/Waste Water Holding Tank

    $119.43 - $476.13
    3
  16. 39% off

    LIST Single-Level Water Tank Alarm - 1/4 Alert - TM-131111

    $193.65
    $116.43
    0

  17. Maretron SAE 5-Bolt Pattern Focus Tube - TFTDBE-5H

    $115.35
    0

  18. Vetus No-Smell Filter with Connections

    $115.33 - $162.58
    1

  19. Todd Water Tank Relocation Kit - 90-2219

    $101.83
    0

  20. SCAD Technologies Internal Tank Sensor - 10021

    $99.13
    0

  21. Raritan Tank Sensor - Stick-On Style - STCTSA

    $93.73
    1

  22. Nauta Flexible Tank Fill Fitting - FTP2221

    $88.33
    0

  23. Vetus Connection Kit

    $85.63 - $103.21

  24. SCAD Technologies External Tape-On Tank Sensor - 10022

    $82.93
    1

  25. Maretron TFT-5H-Focus Tube Kit - TFT-5H

    $81.60
    0

  26. Dometic Holding Tank Diptube Kit - 385310660

    $77.57
    0

  27. Todd Water Tank Relocation Kit - 90-2218

    $76.18
    1

  28. Blue Sea Mini OLED Tank Meter

    $70.78
    0

  29. Vetus Fuel Tank Float Sensor - FSENSOR

    $70.78

  30. Dometic Universal Holding Tank Cleanout Kit - 307238685

    $68.08
    1

  31. Vetus Curved Extraction Pipe - WTS78038B

    $59.98

  32. Dometic Holding Tank Flange Kit - 307230272

    $58.63
    0

  33. SCAD Technologies Adapter Plate - 10029

    $55.93
    0

  34. Raritan Tank Monitor Indicator Panel Wire Harness - 152WH

    $47.83

  35. Todd Holding Tank Fitting Adapter Kit - 93-2221

    $43.78
    0

  36. Faria Euro Black Potable Water Tank Level Gauge - 12831

    $42.45

  37. Scepter Potable Water Jerry Can - 5 Gal - 04933

    $37.09
    2

  38. Todd Holding Tank Fitting Adapter Kit - 93-2223

    $34.33
    0

  39. Todd Holding Tank Fitting Adapter Kit - 93-2220

    $34.33
    0

  40. Vetus Right Angle Hose Connection

    $32.98

  41. Nauta Flexible Tank Drawing Nipple - FTP311

    $31.63
    0

  42. Vetus Spare Filter Element for No-Smell Filter - Large - NSF16FE

    $31.63
    1

  43. Todd Holding Tank Fitting Adapter Kit - 93-2222

    $28.93
    0

  44. Vetus Flexible Tank Fitting

    $28.93
    1

  45. Vetus Waste Tank Repair Set - REPSETOT

    $26.83
    0

  46. Vetus Inspection Lid

    $24.90 - $89.68
    2

  47. Nauta Flexible Tank Fill Fitting - FTP1210

    $24.22
    1

  48. Perko Inlet Check Valve - 0635DP0

    $22.10
    1
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About Water / Waste Holding Tanks

Water and Waste Holding Tanks & Fittings


Water / Waste Holding Tanks & Fittings - Defender offers parts galore and a selection of marine holding tanks for waste holding, black water tanks and marine water tanks that will fit just about any boat and application.

What size marine holding tank do you need?


Consider first the boat's needs. Defender offers a full line of marine holding tanks that will fit below any and all decks. The shape and size of your new marine holding tank, the location of the intake and the construction of the tank itself will more accurately determine how many gallons you need.

Boat holding tank construction ABC's.


Rigid tanks are built from polyethylene plastic that is super strong and holds odors inside. Sealed pipe fittings and plugs offer easy conversion from waste storage to water storage on most tanks at Defender. If flexible tanks are a necessity due to boat storage limitations look for 3-layer construction with welded seams.

How long do marine waste holding tanks last?


High quality marine holding tanks from Defender should last as long as your love affair with your boat! High strength plastic with pre drilled fittings and sealed plugs ensure that the chance for leaks are minimal and a holding tank placed under the deck will stay put for quite some time!

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