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Water / Waste Holding Tanks

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

101 Listed

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

    $120.45
    0

  2. SCAD Technologies Adapter Plate - 10029

    $54.16
    0

  3. Victron Energy GX Tank 140 System Monitoring - BPP920140100

    $139.64
    1

  4. Maretron Tank Level Sender - TLM150-01

    $388.33
    1

  5. Vetus Right Angle Hose Connection

    $34.42

  6. Vetus Connection Kit

    $89.41 - $107.77

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

    $35.83
    0

  8. Vetus Fuel Tank Float Sensor - FSENSOR

    $73.90

  9. Perko Inlet Check Valve - 0635DP0

    $23.06
    1

  10. Nauta Flexible Tank Fill Fitting - FTP1210

    $25.27
    1

  11. Nauta Flexible Tank Vent Fitting - FTPE300

    $21.35
    0
  12. 64% off

    Oceanic Systems 4-20mA Tank Level Adaptor - 4291

    $381.28
    $133.84
    0

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

    $337.59
    0

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

    $219.15
    0

  15. Nauta Flexible Tank Drawing Nipple - FTP300

    $18.24
    0

  16. Nauta Flexible Tank Drawing Nipple - FTP400

    $22.71
    0

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

    $30.19
    0

  18. Todd Water Tank Relocation Kit - 90-2218

    $79.54
    1

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

    $16.80

  20. Nauta Flexible Tank Drawing Nipple - FTP1300

    $21.00
    0

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

    $305.19
    0

  22. Vetus Waste Tank Repair Set - REPSETOT

    $27.99
    0

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

    $133.21
    0

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

    $127.50
    0

  25. Veratron Fresh Water Level Sensor with Sealing Kit #930

    $317.21 - $766.23
    0

  26. Raritan Holding Tank Monitor - 1510012

    $714.04
  27. 56% off

    Oceanic Systems Deck-Mounted Water Gauge - 5250-W

    $458.83
    $198.00
    0

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

    $205.03
    0

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

    $86.59
    2

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

    $729.70
    0

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

    $925.78
    0

  32. Dometic 30 HTS-HRZ Basic Series Waste Water Holding Tank System - 28 Gal - 322840301

    $846.85
    0

  33. Dometic Holding Tank Diptube Kit - 385310660

    $80.99
    0

  34. Dometic Holding Tank Flange Kit - 307230272

    $61.21
    0

  35. Vetus Curved Extraction Pipe - WTS78038B

    $62.62

  36. Veratron Marine NMEA 2000 Liquid Level Sensor - B00041501

    $1,173.72
    0

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

    $468.03
    0

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

    $2,279.16

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

    $44.31

  40. Raritan TankAssure Control Panel with Sensor - 15600

    $831.10

  41. Raritan TankAssure Sensor Kit - 15610

    $503.97

  42. Raritan TankAssure NMEA2000 Adapter - 15630

    $551.89

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

    $49.93
  44. 39% off

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

    $202.23
    $121.57
    0

  45. Groco Tank Level Sensor Assembly - 450 ASSY

    $457.42
    0

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

    $1,633.65
    0

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

    $726.86
    0

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

    $924.37
    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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