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Water / Waste Holding Tanks

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

98 Listed

  1. Sea-Dog Gas Tank Strap - 359995-1

    $16.80

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

    $757.56
    1

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

    $120.45
    0

  4. Nauta Flexible Tank Fill Fitting - FTP1210

    $25.27
    1

  5. Nauta Flexible Tank Vent Fitting - FTPE300

    $21.35
    0

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

    $38.70
    2

  7. Perko Inlet Check Valve - 0635DP0

    $23.84
    1

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

    $35.83
    0

  9. Todd Water Tank Relocation Kit - 90-2219

    $106.33
    0

  10. Nauta Flexible Tank Drawing Nipple - FTP300

    $18.24
    0

  11. SCAD Technologies Adapter Plate - 10029

    $54.16
    0

  12. Raritan Tank Sensor Module Kit - 15101

    $175.42

  13. Victron Energy GX Tank 140 System Monitoring - BPP920140100

    $139.64
    1

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

    $30.19
    0

  15. Nauta Flexible Tank Drawing Nipple - FTP1300

    $21.00
    0

  16. Nauta Flexible Tank Drawing Nipple - FTP400

    $22.71
    0

  17. Vetus Curved Extraction Pipe - WTS78038B

    $72.49

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

    $205.03
    0

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

    $337.59
    0

  20. Raritan Holding Tank Monitor Indicator Panel - 1520012

    $382.69

  21. Vetus Fuel Tank Float Sensor - FSENSOR

    $83.77

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

    $133.21
    0

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

    $127.50
    0

  24. Veratron Waste Water Level Sensor with Sealing Kit #930

    $506.42
    0

  25. Todd Water Tank Relocation Kit - 90-2218

    $79.54
    1

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

    $417.94
    0

  27. Maretron Tank Level Sender - TLM150-01

    $415.12
    1

  28. Dometic Holding Tank Diptube Kit - 9108558205

    $89.45
    0

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

    $37.24
    1

  30. Vetus Waste Tank Repair Set - REPSETOT

    $31.60
    0

  31. Victron Energy VE.Can Resistive Tank Sender Adapter - BPP900600100

    $468.03
    0

  32. Groco Tank Level Sensor Assembly - 450 ASSY

    $451.78
    0

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

    $219.15
    0
  34. 49% off

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

    $101.42
    0

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

    $44.31

  36. Groco Full Color Touchscreen LCD Monitor - 5" - LCD-5

    $2,279.16

  37. Raritan TankAssure NMEA2000 Adapter - 15630

    $498.31

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

    $49.93

  39. Dometic 10 HTS-T Waste Water Holding Tank System with Pump - 10 Gal - 9108555483

    $1,797.21
    0

  40. Dometic 12 HTS-HRZ Basic Series Waste Water Holding Tank System - 11 Gal - 9108555498

    $803.02
    0

  41. Dometic 12 HTS-VRT Basic Series Waste Water Holding Tank System - 11 Gal - 9108555499

    $798.77
    0

  42. Dometic 15 HTS-HRZ Basic Series Waste Water Holding Tank System - 15 Gal - 9108555500

    $1,016.02
    0

  43. Dometic 15 HTS-VRT Basic Series Waste Water Holding Tank System - 15 Gal - 9108555501

    $1,016.02
    0

  44. Dometic 20 HTS-HRZ Basic Series Waste Water Holding Tank System - 18 Gal - 9108555502

    $883.39
    0

  45. Dometic 28 HTS-T Waste Water Holding Tank System with Pump - 28 Gal - 9108555250

    $2,301.96
    0

  46. Dometic 30 HTS-HRZ Basic Series Waste Water Holding Tank System - 28 Gal - 9108555504

    $928.63
    0

  47. Dometic 40 HTS-HRZ Basic Series Waste Water Holding Tank System - 34 Gal - 9108555505

    $1,040.02
    0

  48. Dometic 40 HTS-T Waste Water Holding Tank System with Pump - 40 Gal - 9108555257

    $2,400.75
    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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