Welcome to Defender Canada! 
Water / Waste Holding Tanks
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Dometic DTM04 TankWatch 4-Level Tank Monitor System
$487.82 -
Vetus Flexible Waste Water Holding Tank
$378.63 - $748.23 -
Vetus Flexible Fresh Water Tank
$270.83 - $510.23 -
Dometic 25 HTS-HRZ Basic Series Waste Water Holding Tank System - 25 Gal - 322800251
$657.44 -
Dometic DTM01 Holding Tank Monitor - 313002311
$220.38 -
Dometic 20 HTS-VRT Basic Series Waste Water Holding Tank System - 18 Gal - 322840202
$728.85 -
Dometic Universal Holding Tank Cleanout Kit - 307238685
$64.98 -
Vetus Ultrasonic Fluid Level Sensor
$246.98 - $258.18 -
9% offLIST 3-Level Waste Tank Monitor - TM-332111
$332.40$299.22 -
Vetus Universal Synthetic Tank
$234.70 - $1,220.34 -
Vetus Water Tank Fitting
$29.98 -
Dometic Multi-Level Tank Monitor System
$475.18 -
Vetus Inspection Lid
$25.80 - $92.98 -
Vetus Diesel Inspection Lid - ILT120B
$126.60 -
LIST Single-Level Waste Tank Alarm - 3/4 Alert - TM-132111
$214.80 -
Vetus Universal Tank Float Sensor
$218.98 - $322.58 -
Vetus Waste Tank Repair Set - REPSETOT
$27.80 -
34% offLIST Single-Level Water Tank Alarm - 1/4 Alert - TM-131111
$200.80$130.73 -
Dometic 10 HTS-T Waste Water Holding Tank System with Pump - 10 Gal - 322721012
$1,531.07 -
Dometic 15 HTS-VRT Basic Series Waste Water Holding Tank System - 15 Gal - 322840152
$824.02 -
Dometic 28 HTS-T Waste Water Holding Tank System with Pump - 28 Gal - 322012812
$1,938.44 -
Dometic 30 HTS-HRZ Basic Series Waste Water Holding Tank System - 28 Gal - 322840301
$754.05 -
Dometic Holding Tank Diptube Kit - 385310660
$98.62 -
Dometic Holding Tank Flange Kit - 307230272
$56.58 -
Vetus Fuel Tank Float Sensor - FSENSOR
$73.38 -
19% offLIST 3-Level Water Tank Monitor - TM-331111
$332.40$266.04 -
Dometic 12 HTS-VRT Basic Series Waste Water Holding Tank System - 11 Gal - 322840122
$646.11 -
Dometic 15 HTS-HRZ Basic Series Waste Water Holding Tank System - 15 Gal - 322840151
$822.62 -
Dometic 20 HTS-HRZ Basic Series Waste Water Holding Tank System - 18 Gal - 322840201
$714.73 -
Dometic 40 HTS-HRZ Basic Series Waste Water Holding Tank System - 34 Gal - 322840401
$843.65 -
Dometic 40 HTS-T Waste Water Holding Tank System with Pump - 40 Gal - 322014012
$1,834.93 -
Dometic 55 HTS-HRZ Basic Series Waste Water Holding Tank System - 55 Gal - 322840551
$971.14 -
Dometic 12 HTS-HRZ Basic Series Waste Water Holding Tank System - 11 Gal - 322840121
$648.93
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!