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Class A Customs 40 Gallon RV Black Water Tank

$299.95 on Amazon.com (as of September 26, 2026, 6:25 PM EST) View details ↗

Upgrade your recreational vehicle, camper, or tiny home sanitation system with the Class A Customs 40 Gallon RV Waste Water Holding Tank. Proudly manufactured in the United States, this heavy-duty tank is constructed from durable Medium Density Polyethylene (MDPE) resin. Engineered specifically for gray and black wastewater management, this reliable containment solution features a seamless, one-piece molded design that eliminates vulnerable seams and significantly reduces the risk of leaks or bursts.

Designed for OEM applications and versatile installation, the unit comes equipped with a factory-installed 3″ ABS female pipe outlet. Please note that the end user is responsible for determining placement and installing the necessary inlet and vent fittings, as hardware, piping, and dump valves are not included. To ensure optimal performance and longevity, professional installation by a certified technician is strongly recommended, and care should be taken to avoid over-tightening fittings or pressurizing the tank during setup.

Capacity40 Gallon
MaterialMedium Density Polyethylene (MDPE)
Outlet3″ ABS Female Pipe
ApplicationWaste / Gray Water Use Only
Can this tank be used for a freshwater supply?
No, this tank is strictly designated for waste and gray water use only and must never be used for fresh or drinking water.
Are the inlet, vent, and mounting hardware included with the tank?
No, the inlet and vent fittings, additional hardware, mounting brackets, piping, and dump valves are not included and must be sourced separately.
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