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Celebrating over 50 years of Trusted Marine Service
Over 50 years of Trusted Marine Service

Holding Tanks

Marine Holding Tanks for Waste Management Systems

Premium holding tanks engineered for reliable onboard waste storage and sanitation compliance. Our collection features certified tanks from leading marine manufacturers, designed to meet USCG, ABYC, and international maritime standards.

Key Features:

  • Polyethylene and stainless steel construction for corrosion resistance
  • Multiple capacity options from compact 6-gallon to large-capacity 65+ gallon systems
  • Integrated level sensors and vent fittings
  • Odor-sealed designs with proper ventilation systems
  • Compatible with standard marine sanitation devices (MSD Type I, II, III)
  • UV-resistant materials for deck or below-deck installation

Applications: Sailboats, powerboats, yachts, commercial vessels, and workboats requiring compliant waste holding solutions.

All tanks ship with manufacturer warranties and installation guidelines. Select by capacity, dimensions, and fitting configurations to match your vessel's sanitation system requirements.

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Sealand Dip Tube Kit – VacuFlush Marine Toilet Replacement (SLD-310660)

$130.11 - $130.11
$130.11
$130.11
$130.11 - $130.11
$130.11
Out of stock

Sealand Dip Tube Kit – VacuFlush Marine Toilet Replacement (SLD-310660)Keep your Sealand VacuFlush system operating at peak efficiency with this ge...

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$130.11 - $130.11
$130.11
$130.11
$130.11 - $130.11
$130.11
Sold out
Sold out

Sealand Inlet Elbow with Uniseal – Marine Toilet Replacement Fitting (SLD-311608)

$110.64 - $110.64
$110.64
$110.64
$110.64 - $110.64
$110.64
Out of stock

Sealand Inlet Elbow with Uniseal – Marine Toilet Replacement Fitting (SLD-311608)Restore proper water supply to your marine head with this genuine ...

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$110.64 - $110.64
$110.64
$110.64
$110.64 - $110.64
$110.64
Sold out

LALIZAS Ball Valve 1-1/4" PVC - Full Port Marine Grade Shut-Off Valve

$12.68 - $12.68
$12.68
$12.68 - $12.68
$12.68

Professional Marine Grade PVC Ball Valve - 1-1/4 InchThe LALIZAS Ball Valve is a professional-grade 1-1/4" PVC shut-off valve designed for marine p...

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$12.68 - $12.68
$12.68
$12.68 - $12.68
$12.68

LALIZAS Ball Valve 1-1/2" PVC - Full Port Marine Grade Shut-Off Valve

$15.27 - $15.27
$15.27
$15.27 - $15.27
$15.27

Professional Marine Grade PVC Ball Valve - 1-1/2 InchThe LALIZAS Ball Valve is a professional-grade 1-1/2" PVC shut-off valve designed for marine p...

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$15.27 - $15.27
$15.27
$15.27 - $15.27
$15.27

Ball Valve - 1-1/2" Single Union - BSPP Threaded - Plastic - Orange Handle

$54.86 - $54.86
$54.86
$54.86 - $54.86
$54.86

Ball Valve - 1-1/2" Single Union - BSPP Threaded - PlasticDurable plastic ball valve with single union design and 1-1/2" BSPP (British Standard Pip...

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$54.86 - $54.86
$54.86
$54.86 - $54.86
$54.86

Ball Valve - 2" Single Union - BSPP Threaded - Plastic - Orange Handle

$82.89 - $82.89
$82.89
$82.89 - $82.89
$82.89

Ball Valve - 2" Single Union - BSPP Threaded - PlasticDurable plastic ball valve with single union design and 2" BSPP (British Standard Pipe Parall...

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$82.89 - $82.89
$82.89
$82.89 - $82.89
$82.89

Hose Adaptor for Valve - 1-1/2" BSPP Threaded - Plastic - Marine Plumbing Fitting

$8.12 - $8.12
$8.12
$8.12 - $8.12
$8.12

Hose Adaptor for Valve - 1-1/2" BSPP Threaded - PlasticPlastic hose adaptor designed for connecting hoses to valves with 1-1/2" BSPP (British Stand...

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$8.12 - $8.12
$8.12
$8.12 - $8.12
$8.12

Hose Adaptor for Valve - 2" BSPP Threaded - Plastic - Marine Plumbing Fitting

$11.15 - $11.15
$11.15
$11.15 - $11.15
$11.15

Hose Adaptor for Valve - 2" BSPP Threaded - PlasticPlastic hose adaptor designed for connecting hoses to valves with 2" BSPP (British Standard Pipe...

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$11.15 - $11.15
$11.15
$11.15 - $11.15
$11.15

Ball Valve - 1" Single Union - BSPP Threaded - Plastic - Orange Handle

$30.58 - $30.58
$30.58
$30.58 - $30.58
$30.58

Ball Valve - 1" Single Union - BSPP Threaded - PlasticDurable plastic ball valve with single union design and 1" BSPP (British Standard Pipe Parall...

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$30.58 - $30.58
$30.58
$30.58 - $30.58
$30.58

Hose Adaptor for Valve - 1" BSPP Threaded - Plastic - Marine Plumbing Fitting

$3.84 - $3.84
$3.84
$3.84 - $3.84
$3.84

Hose Adaptor for Valve - 1" BSPP Threaded - PlasticPlastic hose adaptor designed for connecting hoses to valves with 1" BSPP (British Standard Pipe...

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$3.84 - $3.84
$3.84
$3.84 - $3.84
$3.84

Fuel/Water Tank Sensor - 240-33 Ohm - 12" (300mm) Height

$110.48 - $110.48
$110.48
$110.48 - $110.48
$110.48

Marine Fuel/Water Tank Level SensorPrecision tank level sensor designed for accurate fuel and water tank monitoring. Features 240-33 ohm resistance...

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$110.48 - $110.48
$110.48
$110.48 - $110.48
$110.48

Stainless Steel Deck Filler - 38mm (2") - Waste Water - Brown Cap - Black Base

$69.36 - $69.36
$69.36
$69.36 - $69.36
$69.36

Stainless Steel Deck Filler - Waste Water - 38mm (2")Professional-grade stainless steel deck filler designed specifically for waste water systems. ...

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$69.36 - $69.36
$69.36
$69.36 - $69.36
$69.36

BLIZZARD Waste Water Tank - 80L (21.1 Gal) - Horizontal - HDPE - Base Tank Only - Marine Holding Tank

$659.53 - $659.53
$659.53
$659.53 - $659.53
$659.53

BLIZZARD Waste Water Tank - 80L (21.1 Gal) - Horizontal - Base Tank OnlyPremium horizontal waste water holding tank constructed from odour-free hig...

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$659.53 - $659.53
$659.53
$659.53 - $659.53
$659.53

BLIZZARD Waste Water Tank - 40L (10.6 Gal) - Horizontal - HDPE - Base Tank Only - Marine Holding Tank

$585.46 - $585.46
$585.46
$585.46 - $585.46
$585.46

BLIZZARD Waste Water Tank - 40L (10.6 Gal) - Horizontal - Base Tank OnlyPremium horizontal waste water holding tank constructed from odour-free hig...

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$585.46 - $585.46
$585.46
$585.46 - $585.46
$585.46

BLIZZARD Waste Water Tank - 100L (26.4 Gal) - Horizontal - HDPE - Base Tank Only - Marine Holding Tank

$728.48 - $728.48
$728.48
$728.48 - $728.48
$728.48

BLIZZARD Waste Water Tank - 100L (26.4 Gal) - Horizontal - Base Tank OnlyPremium horizontal waste water holding tank constructed from odour-free hi...

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$728.48 - $728.48
$728.48
$728.48 - $728.48
$728.48

ZEFIRO Waste Water Tank - 60L (15.9 Gal) - Vertical - HDPE - Gravity Discharge - Marine Holding Tank

$587.14 - $587.14
$587.14
$587.14 - $587.14
$587.14

ZEFIRO Waste Water Tank - 60L (15.9 Gal) - Vertical - HDPEPremium vertical waste water holding tank constructed from odour-free high-density polyet...

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$587.14 - $587.14
$587.14
$587.14 - $587.14
$587.14

ZEFIRO Waste Water Tank - 40L (10.6 Gal) - Vertical - HDPE - Gravity Discharge - Marine Holding Tank

$573.42 - $573.42
$573.42
$573.42 - $573.42
$573.42

ZEFIRO Waste Water Tank - 40L (10.6 Gal) - Vertical - HDPEPremium vertical waste water holding tank constructed from odour-free high-density polyet...

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$573.42 - $573.42
$573.42
$573.42 - $573.42
$573.42

BLIZZARD Waste Water Tank - 60L (15.9 Gal) - Horizontal - HDPE - Base Tank Only - Marine Holding Tank

$610.73 - $610.73
$610.73
$610.73 - $610.73
$610.73

BLIZZARD Waste Water Tank - 60L (15.9 Gal) - Horizontal - Base Tank OnlyPremium horizontal waste water holding tank constructed from odour-free hig...

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$610.73 - $610.73
$610.73
$610.73 - $610.73
$610.73

DIABLO Easy Switch Waste Water Plate - 230mm (10") Tank Height - Holding Tank Sensor

$169.66 - $169.66
$169.66
$169.66 - $169.66
$169.66

DIABLO Easy Switch Waste Water Plate - 230mm Tank HeightProfessional waste water tank level monitoring plate designed for 230mm (10") tank height. ...

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$169.66 - $169.66
$169.66
$169.66 - $169.66
$169.66