Marine Holding Tanks

Everything for hygienic waste storage and compliant sanitation systems

A reliable holding tank is an essential component of any onboard sanitation system. In our primary Holding Tanks category, you will find a wide range of blackwater and greywater tanks, complete holding tank systems, and accessories for all types of boats. Installing a holding tank is key to maintaining onboard hygiene and odor control, as well as staying compliant with environmental regulations prohibiting direct overboard discharge. Whether you need a compact poly tank for a small cabin boat or a fully integrated system with a macerator pump: find the perfect setup at Marine-Outlet.

Polyethylene tanks, integrated kits, and accessories

Our collection features high-grade, odor-proof tanks and installation hardware:

• Rigid polyethylene (HDPE) tanks: Fully odor-impermeable, corrosion-free, and lightweight; suitable for blackwater (toilets) and greywater (sinks and showers).

• Complete holding tank systems: Ready-to-install tanks pre-fitted with discharge macerator pumps, fittings, and level sensors.

• Holding tank vent filters: Activated carbon filters designed to prevent unpleasant odors from escaping through the deck vent.

• Tank level gauges & senders: Reliable, non-contact level sensors and gauges to accurately monitor tank capacity.

Odor-free installation and maintenance

An effective waste water system depends on proper installation. Always use special odor-impermeable sanitation hose to prevent smells from permeating through hose walls over time. Pair your tank with the correct deck pump-out fitting (WASTE) and marine tank additives to keep valves lubricated and prevent waste buildup.

Explore our complete range of marine holding tanks and accessories online at Marine-Outlet.