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Water / Waste Holding Tanks

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

102 Listed

  1. 9% off

    Nauta Flexible Tank Drawing Nipple - FTP1300

    $17.66
    $15.96
    0

  2. Nauta Flexible Tank Drawing Nipple - FTP300

    $16.87
    0

  3. Nauta Flexible Tank Vent Fitting - FTPE300

    $19.71
    0

  4. Nauta Flexible Tank Drawing Nipple - FTP400

    $20.98
    0

  5. Perko Inlet Check Valve - 0635DP0

    $22.90

  6. Nauta Flexible Tank Fill Fitting - FTP1210

    $23.32
    1

  7. Vetus Inspection Lid

    $25.80 - $92.98
    1
  8. 9% off

    Vetus Flexible Tank Fitting

    $29.98
    $27.04 - $29.98
    0

  9. Vetus Waste Tank Repair Set - REPSETOT

    $27.80
    0

  10. Nauta Flexible Tank Drawing Nipple - FTP311

    $29.98
    0

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

    $29.98
    0

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

    $32.78

  13. Vetus Right Angle Hose Connection

    $34.18

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

    $35.58
    0

  15. Todd Holding Tank Fitting Adapter Kit - 93-2220

    $35.58
    0

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

    $38.43
    2

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

    $44.00

  18. Todd Holding Tank Fitting Adapter Kit - 93-2221

    $45.38
    0

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

    $49.58

  20. Dometic Holding Tank Flange Kit - 307230272

    $56.58
    0

  21. SCAD Technologies Adapter Plate - 10029

    $57.98
    0

  22. Vetus Curved Extraction Pipe - WTS78038B

    $62.18

  23. Dometic Universal Holding Tank Cleanout Kit - 307238685

    $64.98
    1

  24. Blue Sea Mini OLED Tank Meter

    $66.38 - $67.78
    0

  25. Vetus Fuel Tank Float Sensor - FSENSOR

    $73.38

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

    $76.20
    0

  27. Todd Water Tank Relocation Kit - 90-2218

    $78.98
    1

  28. Dometic Holding Tank Diptube Kit - 385310660

    $80.42
    0

  29. Nauta Flexible Tank Fill Fitting - FTP2221

    $84.58
    0

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

    $85.98
    0

  31. Vetus Connection Kit

    $88.78 - $107.01

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

    $91.60
    0

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

    $95.08
    0

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

    $97.18
    1

  35. SCAD Technologies Internal Tank Sensor - 10021

    $102.78
    0

  36. Todd Water Tank Relocation Kit - 90-2219

    $105.58
    0

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

    $114.00
    0

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

    $118.20
    0

  39. Vetus No-Smell Filter with Connections

    $119.58 - $168.58
  40. 34% off

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

    $200.80
    $130.73
    0

  41. Todd Fresh Water/Waste Water Holding Tank

    $130.83 - $525.93
    1

  42. Victron Energy GX Tank 140 System Monitoring - BPP920140100

    $138.66
    0

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

    $150.38
    3

  44. Raritan Tank Sensor - Float Style - STCFL

    $150.38
    0

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

    $156.01
    4

  46. Raritan Tank Sensor Module Kit - 15101

    $174.18
  47. 53% off

    Oceanic Systems 4-20mA Tank Level Adaptor - 4291

    $378.58
    $175.60
    0
  48. 54% off

    Oceanic Systems Panel-Mounted Holding Tank Pumpout Gauge - 3350-HTPO

    $385.58
    $175.60
    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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