Water / Waste Holding Tanks

  1. Todd Fresh Water/Waste Water Holding Tank

    $136.41 - $548.43
    1
  2. Vetus Flexible Fresh Water Tank

    $282.41 - $532.07
    1
  3. Plastimo Rectangular Flexible Water Tank - 26.4 Gal - 70965

    $161.21
    3
  4. Plastimo Rectangular Flexible Water Tank - 52.8 Gal - 70956

    $245.91
    0
  5. SCAD TM2 Tank Monitor for Two Tanks - 10041

    $222.50
    1
  6. Vetus Flexible Waste Water Holding Tank

    $394.83 - $780.27
    1
  7. SCAD Technologies External Tape-On Tank Sensor - 10022

    $89.64
    0
  8. Dometic 25 HTS-HRZ Basic Series Waste Water Holding Tank System - 25 Gal - 322800251

    $722.08
    0
  9. Nauta Heavy Duty Diesel Fuel and Waste Tank - 14.5 Gal - FT915122

    $803.62
    0
  10. Nauta Flexible Fresh Water Tank

    $524.76 - $889.77
    0
  11. Veratron VDO Fresh Water Level Sender - 226-828-001-001K

    $562.98
    1
  12. Plastimo Square Flexible Fresh Water Tank - 13.2 Gal - 70963

    $117.40
    0
  13. Dometic DTM01 Holding Tank Monitor - 313002311

    $229.80
    0
  14. Dometic 20 HTS-VRT Basic Series Waste Water Holding Tank System - 18 Gal - 322840202

    $799.47
    0
  15. Plastimo Triangular Flexible Water Tank - 31.7 Gal - 70957

    $186.04
    0
  16. Blue Sea Systems M2 OLED Digital Tank Monitor - 1839

    $403.54
    0
  17. Dometic Multi-Level Tank Monitor System

    $495.52
    0
  18. Scepter Potable Water Jerry Can - 5 Gal - 04933

    $40.05
    2
  19. Nauta Flexible Tank Fill Fitting - FTP2221

    $88.18
    0
  20. Dometic Universal Holding Tank Cleanout Kit - 307238685

    $67.74
    1
  21. Raritan Holding Tank Monitor - 1510012

    $739.34
  22. SCAD Technologies Internal Tank Sensor - 10021

    $107.16
    0
  23. Vetus Flexible Tank Fitting

    $31.24
    0
  24. Blue Sea Mini OLED Tank Meter

    $69.20 - $70.66
    0
  25. Raritan Tank Sensor - Stick-On Style - STCTSA

    $101.32
    1
  26. Todd Holding Tank Fitting Adapter Kit - 93-2221

    $47.30
    0
  27. Blue Sea Systems VSM 422 Vessel Systems Monitor Tank Sender

    $167.02 - $168.48
  28. Veratron Level Sensor Single Station with Seal Kit - 226-801-015-001G

    $99.13
    0
  29. LIST Single-Level Waste Tank Alarm - 3/4 Alert - TM-132111

    $223.98
    0
  30. Nauta Flexible Tank Drawing Nipple - FTP311

    $31.24
    0
  31. Vetus Ultrasonic Fluid Level Sensor

    $257.54 - $269.22
  32. 9% off

    LIST 3-Level Waste Tank Monitor - TM-332111

    $346.62
    $312.02
    1
  33. Vetus Universal Synthetic Tank

    $244.73 - $1,272.61
  34. Todd Water Tank Relocation Kit - 90-2219

    $110.08
    0
  35. Dometic 30 HTS-HRZ Basic Series Waste Water Holding Tank System - 28 Gal - 322840301

    $827.21
    0
  36. Dometic Holding Tank Flange Kit - 307230272

    $58.98
    0
  37. Raritan TankAssure Control Panel with Sensor - 15600

    $860.55
  38. Raritan Holding Tank Monitor Indicator Panel - 1520012

    $396.24
  39. Nauta Flexible Tank Fill Fitting - FTP1210

    $24.29
    1
  40. Todd Holding Tank Fitting Adapter Kit - 93-2220

    $37.08
    0
  41. Veratron Fresh Water Level Sensor with Sealing Kit #930

    $235.79 - $574.38
    0
  42. Nauta Flexible Tank Vent Fitting - FTPE300

    $20.53
    0
  43. Todd Holding Tank Fitting Adapter Kit - 93-2223

    $37.08
    0
  44. Vetus Universal Tank Float Sensor

    $228.34 - $336.38
  45. Groco 4-Way Tank Selector Kit - TS-350-T

    $260.48
  46. Dometic 15 HTS-VRT Basic Series Waste Water Holding Tank System - 15 Gal - 322840152

    $904.56
    0
  47. Groco SweetTank Odor Neutralization System

    $530.58 - $539.34
    0
  48. Todd Water Tank Relocation Kit - 90-2218

    $82.34
    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!