Welcome to Defender Canada! 
Water / Waste Holding Tanks
-
Nauta Heavy Duty Diesel Fuel and Waste Tank - 14.5 Gal - FT915122
$770.62 -
Dometic 20 HTS-VRT Basic Series Waste Water Holding Tank System - 18 Gal - 322840202
$728.85 -
Dometic 25 HTS-HRZ Basic Series Waste Water Holding Tank System - 25 Gal - 322800251
$657.44 -
Groco SweetTank Odor Neutralization System
$587.20 - $597.00 -
Veratron VDO Fresh Water Level Sender - 226-828-001-001K
$539.86 -
Nauta Flexible Fresh Water Tank
$503.22 - $812.63 -
Dometic DTM04 TankWatch 4-Level Tank Monitor System
$487.82 -
Dometic Multi-Level Tank Monitor System
$475.18 -
Groco Tank Level Sensor - 08-0004-02
$455.58 -
Blue Sea Systems M2 OLED Digital Tank Monitor - 1839
$386.98 -
Vetus Flexible Waste Water Holding Tank
$378.63 - $748.23 -
Veratron Waste Water Level Sensor with Sealing Kit #930
$360.94 - $689.82 -
9% offLIST 3-Level Waste Tank Monitor - TM-332111
$332.40$299.22 -
Vetus Flexible Fresh Water Tank
$270.83 - $510.23 -
19% offLIST 3-Level Water Tank Monitor - TM-331111
$332.40$266.04 -
SCAD TM1 Tank Monitor with External Sensor Strip - 10040
$262.38 -
Dometic DTM01 Holding Tank Monitor - 313002311
$220.38 -
LIST Single-Level Waste Tank Alarm - 3/4 Alert - TM-132111
$214.80 -
SCAD TM2 Tank Monitor for Two Tanks - 10041
$213.38 -
Raritan Tank Sensor Module Kit - 15101
$174.18 -
Todd Fresh Water/Waste Water Holding Tank
$163.03 - $495.13 -
Blue Sea Systems VSM 422 Vessel Systems Monitor Tank Sender
$160.18 - $161.58 -
Raritan Tank Sensor - Float Style - STCFL
$150.38 -
34% offLIST Single-Level Water Tank Alarm - 1/4 Alert - TM-131111
$200.80$130.73 -
Todd Water Tank Relocation Kit - 90-2219
$105.58 -
SCAD Technologies Internal Tank Sensor - 10021
$102.78 -
Raritan Tank Sensor - Stick-On Style - STCTSA
$97.18 -
Todd Water Tank Relocation Kit - 90-2218
$95.78 -
Veratron Level Sensor Single Station with Seal Kit - 226-801-015-001G
$95.08 -
SCAD Technologies External Tape-On Tank Sensor - 10022
$85.98 -
Nauta Flexible Tank Fill Fitting - FTP2221
$84.58 -
Blue Sea Mini OLED Tank Meter
$66.38 - $67.78 -
Dometic Universal Holding Tank Cleanout Kit - 307238685
$64.98 -
Todd Holding Tank Fitting Adapter Kit - 93-2221
$50.98 -
Todd Holding Tank Fitting Adapter Kit - 93-2223
$42.58 -
Todd Holding Tank Fitting Adapter Kit - 93-2220
$39.78 -
Scepter Potable Water Jerry Can - 5 Gal - 04933
$38.43 -
Todd Holding Tank Fitting Adapter Kit - 93-2222
$35.58 -
Vetus Water Tank Fitting
$29.98 -
Nauta Flexible Tank Drawing Nipple - FTP311
$29.98 -
Vetus Inspection Lid
$25.80 - $92.98 -
Nauta Flexible Tank Fill Fitting - FTP1210
$23.32 -
Nauta Flexible Tank Drawing Nipple - FTP400
$20.98 -
Nauta Flexible Tank Vent Fitting - FTPE300
$19.71 -
Nauta Flexible Tank Drawing Nipple - FTP1300
$17.66
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!