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Water / Waste Holding Tanks

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

100 Listed

  1. Blue Sea Systems M2 OLED Digital Tank Monitor - 1839

    $389.74
    1

  2. Maretron Tank Level Sender - TLM150-01

    $415.12
    1

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

    $90.84
    1

  4. Dometic DTM01 Holding Tank Monitor - 313002311

    $231.82
    1

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

    $161.32
    9

  6. Dometic Universal Holding Tank Cleanout Kit - 307238685

    $71.08
    1

  7. Vetus Flexible Fresh Water Tank

    $272.76 - $513.87
    1

  8. Vetus Flexible Waste Water Holding Tank

    $381.33 - $753.57
    1

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

    $205.06
    4

  10. Plastimo Rectangular Flexible Water Tank - 52.8 Gal - 70956

    $305.19
    2

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

    $179.67
    1

  12. Victron Energy GX Tank 140 System Monitoring - BPP920140100

    $139.64
    1

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

    $107.74
    1

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

    $110.56
    2

  15. SCAD Technologies Internal Tank Sensor - 10021

    $147.22
    1

  16. SCAD TM2 Tank Monitor for Two Tanks - 10041

    $213.49
    3

  17. Veratron VDO Fresh Water Level Sender - 226-828-001-001K

    $757.56
    1

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

    $38.70
    2

  19. Vetus Flexible Tank Fitting

    $30.19
    1

  20. Vetus Inspection Lid

    $25.98 - $90.82
    2

  21. Perko Inlet Check Valve - 0635DP0

    $23.06
    1

  22. Todd Fresh Water/Waste Water Holding Tank

    $124.71 - $497.25
    3

  23. LIST 3-Level Waste Tank Monitor - TM-332111

    $337.59
    2
  24. 14% off

    Nauta Flexible Fresh Water Tank

    $506.81 - $859.32
    $430.89 - $730.52
    2

  25. Maretron NMEA 2000 Tank Level Monitor - TLM100-01

    $371.41
    3

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

    $289.63
    7

  27. Dometic DTM04 TankWatch 4-Level Tank Monitor System

    $542.06
    2

  28. Nauta Flexible Tank Fill Fitting - FTP1210

    $25.27
    1

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

    $33.01
    1

  30. Todd Water Tank Relocation Kit - 90-2218

    $79.54
    1

  31. Vetus No-Smell Filter with Connections

    $120.43 - $169.78
    1

  32. Blue Sea Mini OLED Tank Meter

    $73.90
    0

  33. LIST 3-Level Water Tank Monitor - TM-331111

    $337.59
    0

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

    $219.15
    0
  35. 39% off

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

    $202.23
    $121.57
    0

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

    $205.03
    0

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

    $120.45
    0

  38. Maretron Tank Level NMEA 2000 Adapter - TLA100-01

    $417.94
    0

  39. Groco SweetTank Odor Neutralization System

    $513.84 - $529.35
    0

  40. Groco Tank Level Sensor - 08-0004-02

    $350.26
    0

  41. Groco Tank Level Sensor Assembly - 450 ASSY

    $457.42
    0

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

    $1,633.65
    0

  43. Dometic 12 HTS-HRZ Basic Series Waste Water Holding Tank System - 11 Gal - 322840121

    $729.70
    0

  44. Dometic 12 HTS-VRT Basic Series Waste Water Holding Tank System - 11 Gal - 322840122

    $726.86
    0

  45. Dometic 15 HTS-HRZ Basic Series Waste Water Holding Tank System - 15 Gal - 322840151

    $924.37
    0

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

    $925.78
    0

  47. Dometic 20 HTS-HRZ Basic Series Waste Water Holding Tank System - 18 Gal - 322840201

    $803.02
    0

  48. Dometic 20 HTS-VRT Basic Series Waste Water Holding Tank System - 18 Gal - 322840202

    $817.24
    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!

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