Defender Canada
Free Shipping on orders over $99*

Water / Waste Holding Tanks

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

102 Listed

  1. Raritan Holding Tank Monitor Indicator Panel - 1520012

    $379.98

  2. Blue Sea Mini OLED Tank Meter

    $66.38 - $67.78
    0

  3. Vetus No-Smell Filter with Connections

    $119.58 - $168.58

  4. Vetus Right Angle Hose Connection

    $34.18

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

    $35.58
    0

  6. Dometic Holding Tank Flange Kit - 307230272

    $56.58
    0

  7. Raritan Tank Sensor - Float Style - STCFL

    $150.38
    0

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

    $35.58
    0

  9. Raritan Tank Sensor Module Kit - 15101

    $174.18

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

    $867.42
    0

  11. Dometic Holding Tank Diptube Kit - 385310660

    $80.42
    0

  12. Nauta Flexible Tank Fill Fitting - FTP1210

    $23.32
    1

  13. Nauta Flexible Tank Vent Fitting - FTPE300

    $19.71
    0

  14. Vetus Curved Extraction Pipe - WTS78038B

    $62.18

  15. Vetus Fuel Tank Float Sensor - FSENSOR

    $73.38

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

    $335.20
    0

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

    $29.98
    0

  18. Todd Water Tank Relocation Kit - 90-2218

    $78.98
    1
  19. 56% off

    Oceanic Systems Deck-Mounted Water Gauge - 5250-W

    $455.58
    $196.60
    0

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

    $196.58
    0

  21. Vetus Waste Tank Repair Set - REPSETOT

    $27.80
    0
  22. 9% off

    Nauta Flexible Tank Drawing Nipple - FTP1300

    $17.66
    $15.96
    0

  23. Nauta Flexible Tank Drawing Nipple - FTP400

    $20.98
    0

  24. Vetus Connection Kit

    $88.78 - $107.01

  25. Perko Inlet Check Valve - 0635DP0

    $22.90
  26. 34% off

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

    $200.80
    $130.73
    0

  27. Todd Water Tank Relocation Kit - 90-2219

    $105.58
    0

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

    $226.12 - $550.80
    0

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

    $49.58

  30. Dometic 28 HTS-T Waste Water Holding Tank System with Pump - 28 Gal - 322012812

    $1,938.44
    0

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

    $793.25
    0

  32. SCAD Technologies Adapter Plate - 10029

    $57.98
    0

  33. SCAD Technologies Internal Tank Sensor - 10021

    $102.78
    0
  34. 53% off

    Oceanic Systems 4-20mA Tank Level Adaptor - 4291

    $378.58
    $175.60
    0
  35. 56% off

    Oceanic Systems Submersible Hydrostatic Sensor

    $455.58
    $196.60
    0

  36. Nauta Flexible Tank Drawing Nipple - FTP300

    $16.87
    0

  37. Veratron Marine NMEA 2000 Liquid Level Sensor - B00041501

    $756.60
    0

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

    $91.60
    0

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

    $360.94 - $689.82
    0

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

    $464.72
    0

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

    $44.00

  42. Raritan TankAssure Sensor Kit - 15610

    $500.40

  43. Raritan TankAssure NMEA2000 Adapter - 15630

    $547.98

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

    $2,232.20

  45. Groco Tank Level Sensor Assembly - 450 ASSY

    $445.78
    0

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

    $1,531.07
    0

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

    $681.11
    0

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

    $867.42
    0
Previous2 / 3Next

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!

0Filters

Category
Manufacturer
Price
15.96
2233.2
More Ways To Shop
Availability
Fulfillment

Change Locale

Canada - English Shop in currency: CAD
Canada - Français Shop in currency: CAD
United States - English Shop in currency: USD

Helpful Information

Track My Order
Shipping Policy
Return Policy

Get In Touch

Customer Service
1-888-490-6844
Send a Message

Resources

Gift Cards
Privacy Policy
Conditions of Use

Stay Connected

Members receive special perks, including offers and new releases, by subscribing to our monthly newsletter.

    • Ensuring that the email is valid...
    • This might take a few seconds.
    • Are you sure the email is typed correctly?
      Twitter
      Facebook
      Instagram
      YouTube
      Toggle desktop/mobile version
      2025 © Defender Canada. All Rights Reserved.