Water / Waste Holding Tanks
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Nauta Flexible Tank Vent Fitting - FTPE300
$19.03 -
Groco SweetTank Odor Neutralization System
$490.65 - $498.75 -
Vetus Right Angle Hose Connection
$32.98 -
Nauta Flexible Tank Fill Fitting - FTP1210
$22.51 -
Todd Water Tank Relocation Kit - 90-2218
$76.18 -
Dometic Holding Tank Diptube Kit - 385310660
$77.57 -
Raritan Holding Tank Monitor Indicator Panel - 1520012
$366.43 -
LIST Single-Level Waste Tank Alarm - 3/4 Alert - TM-132111
$209.85 -
Vetus Curved Extraction Pipe - WTS78038B
$59.98 -
Perko Inlet Check Valve - 0635DP0
$22.10 -
64% off
Oceanic Systems 4-20mA Tank Level Adaptor - 4291
$365.08$128.17 -
56% off
Oceanic Systems Deck-Mounted Water Gauge - 5250-W
$439.33$189.60 -
Nauta Flexible Tank Drawing Nipple - FTP300
$16.29 -
Nauta Flexible Tank Drawing Nipple - FTP400
$18.85 -
Raritan Tank Sensor - Float Style - STCFL
$145.03 -
LIST 3-Level Water Tank Monitor - TM-331111
$323.25 -
Maretron NMEA 2000 Tank Temperature Immersion Probe - TP-IP-1
$182.83 -
Veratron OceanLink Fresh Water Gauge - 52 mm (2 1/16")
$118.05 -
Veratron Fresh Water Level Sensor with Sealing Kit #930
$240.68 - $585.15 -
Plastimo Square Flexible Fresh Water Tank - 13.2 Gal - 70963
$154.50 -
56% off
Oceanic Systems Submersible Hydrostatic Sensor
$439.33$189.60 -
Vetus Waste Tank Repair Set - REPSETOT
$26.83 -
Todd Holding Tank Fitting Adapter Kit - 93-2222
$28.93 -
SCAD Technologies Adapter Plate - 10029
$55.93 -
SCAD Technologies External Tape-On Tank Sensor - 10022
$82.93 -
SCAD TM1 Tank Monitor with External Sensor Strip - 10040
$253.03 -
SCAD TM2 Tank Monitor for Two Tanks - 10041
$205.78 -
Groco Tank Level Sensor - 08-0004-02
$328.63 -
Dometic 12 HTS-HRZ Basic Series Waste Water Holding Tank System - 11 Gal - 322840121
$698.68 -
Dometic 15 HTS-VRT Basic Series Waste Water Holding Tank System - 15 Gal - 322840152
$886.42 -
Dometic 30 HTS-HRZ Basic Series Waste Water Holding Tank System - 28 Gal - 322840301
$810.85 -
Dometic Holding Tank Flange Kit - 307230272
$58.63 -
Raritan Tank Monitor Indicator Panel Wire Harness - 152WH
$47.83 -
Vetus Fuel Tank Float Sensor - FSENSOR
$70.78 -
Vetus Connection Kit
$85.63 - $103.21 -
39% off
LIST Single-Level Water Tank Alarm - 1/4 Alert - TM-131111
$193.65$116.43 -
Faria Euro Black Potable Water Tank Level Gauge - 12831
$42.45 -
Veratron Marine NMEA 2000 Liquid Level Sensor - B00041501
$1,123.80 -
Veratron Waste Water Level Sensor with Sealing Kit #930
$384.05 - $734.11 -
Victron Energy VE.Can Resistive Tank Sender Adapter - BPP900600100
$448.14 -
Groco Full Color Touchscreen LCD Monitor - 5" - LCD-5
$2,152.50 -
Groco Tank Level Sensor Assembly - 450 ASSY
$429.88 -
Dometic 10 HTS-T Waste Water Holding Tank System with Pump - 10 Gal - 322721012
$1,564.17 -
Dometic 12 HTS-VRT Basic Series Waste Water Holding Tank System - 11 Gal - 322840122
$695.96 -
Dometic 15 HTS-HRZ Basic Series Waste Water Holding Tank System - 15 Gal - 322840151
$885.07 -
Dometic 20 HTS-HRZ Basic Series Waste Water Holding Tank System - 18 Gal - 322840201
$768.89 -
Dometic 28 HTS-T Waste Water Holding Tank System with Pump - 28 Gal - 322012812
$2,020.44 -
Dometic 40 HTS-HRZ Basic Series Waste Water Holding Tank System - 34 Gal - 322840401
$906.70
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!