Water / Waste Holding Tanks

  1. Dometic DVF Holding Tank Vent Filter Replacement Cartridge - 9108849515

    $126.99
    9
  2. SCAD TM1 Tank Monitor with External Sensor Strip - 10040

    $204.99
    8
  3. Todd Fresh Water/Waste Water Holding Tank

    $87.99 - $351.99
    4
  4. Plastimo Rectangular Flexible Water Tank - 26.4 Gal - 70965

    $130.99
    4
  5. Vetus Flexible Fresh Water Tank

    $194.99 - $412.99
    1
  6. Nauta Flexible Fresh Water Tank

    $358.99 - $608.99
    2
  7. Plastimo Rectangular Flexible Water Tank - 52.8 Gal - 70956

    $190.99
    2
  8. SCAD TM2 Tank Monitor for Two Tanks - 10041

    $150.99
    4
  9. Plastimo Triangular Flexible Water Tank - 31.7 Gal - 70957

    $168.99
    0
  10. Plastimo Square Flexible Fresh Water Tank - 13.2 Gal - 70963

    $114.99
    1
  11. Vetus Flexible Waste Water Holding Tank

    $435.99 - $892.99
    1
  12. SCAD Technologies External Tape-On Tank Sensor - 10022

    $77.99
    2
  13. Dometic DTM04 TankWatch 4-Level Tank Monitor System

    $422.99 - $434.99
    2
  14. Dometic 20 HTS-VRT Basic Series Waste Water Holding Tank System - 18 Gal - 9108555503

    $634.99
    0
  15. Maretron NMEA 2000 Tank Level Monitor - TLM100-01

    $262.99
    3
  16. Nauta Heavy Duty Diesel Fuel and Waste Tank - 14.5 Gal - FT915122

    $549.99
    0
  17. Raritan TankAssure Control Panel with Sensor - 15600

    $632.99
  18. Nauta Flexible Tank Fill Fitting - FTP2221

    $64.99
    0
  19. Dometic 25 HTS-HRZ Basic Series Waste Water Holding Tank System - 25 Gal - 9108555494

    $573.99
    0
  20. Vetus Inspection Lid

    $19.99 - $74.99
    2
  21. Groco 4-Way Tank Selector Kit - TS-350-T

    $186.99
  22. LIST 3-Level Waste Tank Monitor - TM-332111

    $238.99
    2
  23. Vetus Universal Synthetic Tank

    $176.99 - $907.99
  24. Blue Sea Systems M2 OLED Digital Tank Monitor - 1839

    $275.99
    1
  25. Raritan Tank Sensor - Stick-On Style - STCTSA

    $75.99
    1
  26. Groco Tank Level Sensor - 08-0004-02

    $244.99
    0
  27. Groco SweetTank Odor Neutralization System

    $363.99 - $371.99
    0
  28. Dometic DTM01 Holding Tank Monitor - 9108688891

    $179.99
    1
  29. Dometic Universal Holding Tank Cleanout Kit - 9108731133

    $54.99
    1
  30. Vetus Fuel Connection Kit Filler

    $273.99 - $324.99
  31. Vetus Flexible Tank Fitting

    $23.99
    1
  32. Dometic Multi-Level Tank Monitor System

    $398.99
    0
  33. Veratron Level Sensor Single Station with Seal Kit - 226-801-015-001G

    $94.05
    0
  34. Vetus Spare Filter Element for No-Smell Filter - Large - NSF16FE

    $25.99
    1
  35. SCAD Technologies Internal Tank Sensor - 10021

    $103.99
    1
  36. Vetus Connection Kit

    $73.99 - $88.99
  37. Todd Holding Tank Fitting Adapter Kit - 93-2221

    $31.99
    0
  38. Nauta Flexible Tank Drawing Nipple - FTP311

    $22.99
    0
  39. Veratron Fresh Water Level Sensor with Sealing Kit #370

    $224.55 - $403.83
    0
  40. Maretron TFT-5H-Focus Tube Kit - TFT-5H

    $63.99
    1
  41. Vetus Universal Tank Float Sensor

    $175.99 - $258.99
  42. Dometic Holding Tank Flange Kit - 9108553349

    $47.99
    0
  43. Raritan TankAssure Sensor Kit - 15610

    $390.99
  44. Raritan Tank Sensor - Float Style - STCFL

    $109.99
    0
  45. Vetus Right Angle Hose Connection

    $26.99
  46. Nauta Flexible Tank Vent Fitting - FTPE300

    $14.72
    0
  47. Blue Sea Mini OLED Tank Meter

    $51.99
    0
  48. Todd Holding Tank Fitting Adapter Kit - 93-2220

    $24.99
    0
 
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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!