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RV Black Water or Waste Holding Tanks

RV Black Water or Waste Holding Tanks - Less than 10 Gallons

RV Waste Holding Tanks: The Permanent Fix for Leaks and Odors
Let's be blunt: there is no problem on an RV worse than a failed waste tank. It's a trip-ender. It's that unshakeable odor, the constant dread of a hidden leak, or the catastrophic mess of a crack. The hard truth is that many factory-installed tanks are made from lightweight, fragile plastic (like ABS) that just can't handle years of road vibration and stress. They were built to fail....

This is your permanent fix. Our heavy-duty RV waste tanks are engineered for one purpose: to give you total peace of mind. This is the RV black tank replacement you do once and never have to think about again. Made from thick-walled, seamless polyethylene, these tanks are built to stop leaks, lock in odors for good, and outlast your rig. Stop patching the problem and solve it for good. Whether you're replacing a 7-gallon septic tank on a camper or installing a 150-gallon waste tank in a motorhome, you'll find a range of sizes, outlet configurations, and customizable options here—ready to mount and get to work.

What's the Difference? Black Water vs. Gray Water

Not all wastewater is created equal. Your RV has two separate systems for a reason, and understanding the job of each is the first step to a leak-free, odor-free system. This is why choosing the right tank for the right application is so critical.

Your RV Toilet Holding Tank

Your RV Toilet Holding Tank

This tank handles the most critical job: containing raw sewage from your toilet. This is your primary RV toilet holding tank, and it must be 100% sealed and reliable.

Heavy-Duty Solution

Heavy-Duty Solution

Because it holds solid waste, the tank must be odor-proof. This is where our heavy-duty, thick-walled polyethylene tanks are essential. They are a true heavy-duty solution, built to be impermeable to waste and prevent the smells that plague thinner, brittle tanks.

For Sinks, Showers, and Galley Use

For Sinks, Showers, and Galley Use

A dedicated RV gray water tank captures all the "used" water from your sinks, showers, and kitchen galley. While it doesn't contain raw sewage, this soapy water and food particulate can still create odors and cause major damage if it leaks.

Durable Choice

Durable Choice

For van, skoolie, and food truck builders, a reliable gray water tank is non-negotiable. Our sewage tanks are so tough, they're honestly over-engineered for this job. This means you get the same seamless, leak-proof, and road-ready durability for your gray water system, ensuring a professional and long-lasting build.

Why RV Owners Trust Tank Depot for Their RV Black Water Tank Replacement

We know that a failed RV black water holding tank is the last thing any owner wants to deal with. It's a messy, stressful job, and you need a solution that you know will work, permanently. We’re not just selling tanks; we're providing a long-term fix so you can get back on the road with total peace of mind.

Lock In Odors for Good

Lock In Odors for Good

This is the #1 reason to upgrade. Our RV waste holding tanks are made from heavy-duty polyethylene with an average wall thickness of 3/8-inch. This thick, seamless material is impermeable to waste, meaning it won't absorb odors over time. It permanently locks in smells that plague thinner, porous tanks.

Built to Stop Leaks

Built to Stop Leaks

The biggest enemy of a factory tank is the highway itself. Constant vibration and chassis flex create stress fractures in brittle, seamed tanks. Our RV black water tanks are rotationally-molded in one solid piece. No seams means no weak points to crack, split, or leak, giving you a far superior plastic black water tank built for the long haul.

Custom Fittings

Custom Fittings

A replacement job can become a nightmare when the new tank's fittings don't line up with your existing plumbing. We solve this. We can provide a custom RV black water tank with fitting relocation kits and accessories installed to your exact specifications. Just send us your drawing, and we'll build a Ronco RV waste tank that drops right into place—no fighting, no extra adapters.

The Right Capacity for Your Rig

The Right Capacity for Your Rig

We stock the size you need, whether you're in a small camper van or a big Class A. With options from a compact 4-gallon RV toilet holding tank to a massive 150 gallon RV waste tank (and popular sizes like the 50 gallon black water tank for RVs in between), you can find the perfect fit to replace your old tank or even upgrade your capacity.

Expert Support for a Nasty Job

Expert Support for a Nasty Job

This isn't the most fun of projects. Nonetheless, our expert team is here to make it easier. We've helped thousands of RVers and food truck operators find the exact RV black tank replacement they need. We'll help you get the right waste holding tank and the right parts the first time, so you only have to do this job once.

Get the Ready-to-Ride System

Get the Ready-to-Ride System

Don't make multiple trips to the hardware store. We have most of the parts you’d typically need to finish the job right, including the fitting relocation kits, dip tubes, and custom fitting kits that are critical for a proper, leak-free septic holding tank for RV installation.

Find the RIght Waste Holding Tank for On the Go

An RV black tank replacement is arguably the most critical upgrade you can make for your rig's health and your own peace of mind. Stop patching old problems, worrying about leaks, or trying to mask odors that just won't quit. It's time to do the job once and do it right with a heavy-duty, seamless wastewater holding tank for RV use that's truly built to last.

Browse our full selection of RV black water and waste holding tanks below and find the permanent solution to your black water problems today.

Less Than 10 Gal

	Capacity	Name	Diameter	Length	Width	Height	SKU	Price
	4 Gallons	Trionic 4 Gallon Plastic Marine and RV Water or Waste Holding Tank		13.125	10	8	TRI-2004	As low as$140.50
	6 Gallons	Trionic 6 Gallon Plastic Marine and RV Water or Waste Holding Tank		16	11.75	8	TRI-2006	As low as$151.00
	7 Gallons	Ronco Plastics 7 Gallon Plastic RV Holding Tank		30	9	11.25	R-9H	$164.99
	7 Gallons	Ronco Plastics 7 Gallon Plastic RV Holding Tank		19	11	13	R-19H	$134.00
	9 Gallons	Ronco Plastics 9 Gallon Plastic RV Holding Tank		30	20	8	R-35H	$252.00
	9 Gallons	Ronco Plastics 9 Gallon Plastic RV Holding Tank		30	12.5	7.25	R-36H	$184.99
	10 Gallons	Ronco Plastics 10 Gallon Plastic RV Holding Tank		36	13	6	R-34H	$199.99
	10 Gallons	Ronco Plastics 10 Gallon Plastic RV Holding Tank		28	15	11	R-59H	$235.00
	10 Gallons	Trionic 10 Gallon Plastic Marine and RV Water or Waste Holding Tank		17	14	10	TRI-2010	As low as$228.33
	10 Gallons	Ronco Plastics 10 Gallon Plastic RV Holding Tank		28	14.5	11	R-100H	$235.00