Water / Waste Holding Tanks

  1. SCAD TM1 Tank Monitor with External Sensor Strip - 10040

    $186.99
    0
  2. Vetus Flexible Fresh Water Tank

    $226.99 - $420.99
    1
  3. Nauta Heavy Duty Diesel Fuel and Waste Tank - 14.5 Gal - FT915122

    $485.99
    0
  4. Vetus Flexible Waste Water Holding Tank

    $298.99 - $567.99
    0
  5. Dometic DTM04 TankWatch 4-Level Tank Monitor System

    $347.99
    0
  6. SCAD TM2 Tank Monitor for Two Tanks - 10041

    $151.99
    0
  7. Nauta Flexible Fresh Water Tank

    $319.99 - $562.99
    0
  8. Dometic 25 HTS-HRZ Basic Series Waste Water Holding Tank System - 25 Gal - 322800251

    $468.99
    0
  9. Plastimo Rectangular Flexible Water Tank - 52.8 Gal - 70956

    $167.99
    0
  10. SCAD Technologies External Tape-On Tank Sensor - 10022

    $60.99
    0
  11. LIST 3-Level Waste Tank Monitor - TM-332111

    $236.99
    1
  12. Todd Fresh Water/Waste Water Holding Tank

    $91.99 - $363.99
    0
  13. Groco Tank Level Sensor - 08-0004-02

    $324.99
    0
  14. Blue Sea Systems Diesel/Water/Waste Tank Level Sender - 1810

    $106.99
    0
  15. 19% off

    Dometic 10 HTS-T Waste Water Holding Tank System with Pump - 10 Gal - 322721012

    $1,037.99
    $840.77
    0
  16. Dometic Universal Holding Tank Cleanout Kit - 307238685

    $45.99
    1
  17. Scepter Potable Water Jerry Can - 5 Gal - 04933

    $22.99
    0
  18. Veratron VDO Fresh Water Level Sender - 226-828-001-001K

    $385.19
    0
  19. Raritan Tank Sensor - Stick-On Style - STCTSA

    $68.99
    0
  20. Nauta Flexible Tank Fill Fitting - FTP2221

    $53.99
    0
  21. 19% off

    Dometic Multi-Level Tank Monitor System

    $309.99 - $327.99
    $248.64 - $327.99
    0
  22. Dometic Holding Tank Diptube Kit - 385310660

    $69.99
    0
  23. Todd Water Tank Relocation Kit - 90-2218

    $66.99
    1
  24. Vetus Water Tank Fitting

    $18.91
    0
  25. Todd Water Tank Relocation Kit - 90-2219

    $71.99
    0
  26. Raritan Tank Sensor - Float Style - STCFL

    $106.99
    0
  27. Dometic Holding Tank Flange Kit - 307230272

    $39.99
    0
  28. Todd Holding Tank Fitting Adapter Kit - 93-2220

    $25.99
    0
  29. LIST Single-Level Waste Tank Alarm - 3/4 Alert - TM-132111

    $152.99
    0
  30. Nauta Flexible Tank Drawing Nipple - FTP311

    $5.69
    0
  31. Nauta Flexible Tank Fill Fitting - FTP1210

    $14.75
    0
  32. Todd Holding Tank Fitting Adapter Kit - 93-2222

    $24.99
    0
  33. Blue Sea Mini OLED Tank Meter

    $46.99
    0
  34. Nauta Flexible Tank Vent Fitting - FTPE300

    $10.74
    0
  35. 10% off

    LIST 3-Level Water Tank Monitor - TM-331111

    $236.99
    $213.29
    0
  36. 19% off

    Nauta Flexible Tank Drawing Nipple - FTP1300

    $12.19
    $9.87
    0
  37. Nauta Flexible Tank Drawing Nipple - FTP300

    $10.62
    0
  38. Vetus Tank Repair Set - REPSETOT

    $22.99
    0
  39. Dometic 12 HTS-HRZ Basic Series Waste Water Holding Tank System - 11 Gal - 322840121

    $462.99
    0
  40. Dometic 15 HTS-VRT Basic Series Waste Water Holding Tank System - 15 Gal - 322840152

    $587.99
    0
  41. Dometic 20 HTS-VRT Basic Series Waste Water Holding Tank System - 18 Gal - 322840202

    $519.99
    0
  42. Dometic 28 HTS-T Waste Water Holding Tank System with Pump - 28 Gal - 322012812

    $1,183.99
    0
  43. Dometic DTM01 Holding Tank Monitor - 313002311

    $155.99
    0
  44. Blue Sea Systems M2 OLED Digital Tank Monitor - 1839

    $299.99
    0
  45. Groco SweetTank Odor Neutralization System

    $405.99 - $412.99
    0
  46. Nauta Flexible Tank Drawing Nipple - FTP400

    $13.32
    0
  47. SCAD Technologies Internal Tank Sensor - 10021

    $72.99
    0
  48. Todd Holding Tank Fitting Adapter Kit - 93-2223

    $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!