Best Tiny House Waste Tanks

Looking for the best tiny house waste tanks? We’ve got you covered with a guide to the top 10 durable and reliable options from Class A Customs, designed to make your tiny house adventure hassle-free.

Tiny house living is all about simplicity and freedom. One key part of this lifestyle is managing waste efficiently. Choosing the right waste tank is essential for a smooth and hassle-free experience.

Class A Customs offers a range of durable waste tanks designed for tiny houses. These tanks are made from Medium Density Polyethylene (MDPE), ensuring long-lasting performance. They come in various sizes to fit your specific needs.

With easy installation and reliable design, these tanks make waste management simple. Explore our guide to find the perfect tank for your tiny house adventure. Let’s get started!

List of Top 10 Tiny House Waste Tanks

Title	Best For	Price
classAcustoms WT-3161 3″ Hub Black Water RV Waste Holding Tank 31 Gallon Concession and Camper Waste Black Gray Tank	This 31-gallon waste tank is perfect for RV, camper, trailer, motorhome, or tiny house owners who need a reliable black or gray water solution. It’s easy to install and made in the USA for durable, worry-free use.	View on Amazon (paid link)
classAcustoms WT-1653 3″ Black Water RV Waste Holding Tank 16 Gallon Concession and Camper Waste Black Gray Tank	This 16-gallon waste tank is perfect for RV, camper, trailer, motorhome, or tiny house owners who need a reliable black or gray water solution. It’s made in the USA and easy to install, but remember: inlet, vent, and fittings are not included.	View on Amazon (paid link)
classAcustoms 28 Gallon RV Waste Black Water Holding Tank WT-2800	This 28-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water solution. It’s made in the USA and easy to install, though you’ll need to add your own inlet, vent, and fittings.	View on Amazon (paid link)
Class A Customs 18.5 Gallon RV Waste Black Water Holding Tank WT-1850	This 18.5-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, making it ideal for DIY upgrades.	View on Amazon (paid link)
Class A Customs 27 Gallon RV Waste Black Water Holding Tank WT-2700	This 27-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, but remember, it’s only for waste water.	View on Amazon (paid link)
Class A Customs 14 Gallon RV Waste Black Water Holding Tank WT-1400	This 14-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, but remember, it’s only for waste water.	View on Amazon (paid link)
classAcustoms WT-3469-3H 3″ Black Water RV Waste Holding Tank 34 Gallon Concession and Camper Waste Black Gray Tank (34 Gallon)	This 34-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black or gray water solution. It’s made in the USA and easy to install, but remember: it’s for waste water only.	View on Amazon (paid link)
Class A Customs 31 Gallon RV Waste Black Water Holding Tank WT-3100	This 31-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, with a 3-inch ABS outlet ready for use. Ideal for waste or gray water, it’s a must-have upgrade for your vehicle or tiny home.	View on Amazon (paid link)
classAcustoms WT-1766 3″ Black Water RV Waste Holding Tank 17 Gallon Concession and Camper Waste Black Gray Tank	This 17-gallon waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black or gray water solution. It’s made in the USA and easy to install, with a 3” ABS outlet ready for use.	View on Amazon (paid link)
Class A Customs 38 Gallon RV Waste Black Water Holding Tank WT-3800	This 38-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, but remember, it’s for waste water only.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 Tiny House Waste Tanks handpicked for durability, performance, and value. Whether you prioritize comfort or affordability, this guide ensures you find the perfect fit. Dive in to make an informed choice for your tiny home needs!

1. classAcustoms WT-3161 3″ Hub Black Water RV Waste Holding Tank 31 Gallon Concession and Camper Waste Black Gray Tank

The classAcustoms WT-3161 is a 31-gallon RV waste holding tank made in the USA. It’s built with Medium Density Polyethylene (MDPE) Resin for durability.

This tank is designed for waste and gray water only, not for fresh or drinking water. It’s perfect for RV’s, campers, trailers, motorhomes, and tiny houses.

Key features include a 3” ABS female pipe outlet and no inlet or vent fittings included. Hardware and piping are not included, so plan accordingly.

Pros	Cons
31-gallon capacity for longer trips without frequent emptying. Durable MDPE material ensures long-lasting use. Easy installation with pre-installed 3″ ABS outlet. Made in the USA for trusted quality.	No fittings or hardware included, so you’ll need to buy extra parts. Outlet can’t be moved, limiting installation options for your setup. Not for fresh water, strictly for waste and gray water only.

Perfect For:

This 31-gallon waste tank is perfect for RV, camper, trailer, motorhome, or tiny house owners who need a reliable black or gray water solution. It’s easy to install and made in the USA for durable, worry-free use.

Ready to Purchase?

View Price on Amazon (paid link)

2. classAcustoms WT-1653 3″ Black Water RV Waste Holding Tank 16 Gallon Concession and Camper Waste Black Gray Tank

The Class A Customs WT-1653 is a 16-gallon black water tank made in the USA. It’s built with Medium Density Polyethylene (MDPE) Resin for durability. Use it for waste or gray water only, not fresh water.

This tank comes with a 3” ABS female pipe outlet that cannot be moved. Do not over-tighten fittings to avoid damage. You’ll need to add your own inlet, vent, and dump valve for proper use.

It’s perfect for RV’s, campers, trailers, and tiny houses. The tank must be vented to work safely. Check the photos for detailed dimensions before buying.

Pros	Cons
Made in USA with durable MDPE resin for long-lasting use. 16-gallon capacity handles waste efficiently for RV and camper needs. 3″ ABS outlet ensures easy installation and reliable dumping. Customizable inlet and vent for flexible setup to fit your space.	No fittings included, requires extra parts for setup. Outlet fixed, can’t move it to fit your needs. Not for fresh water, strictly waste use only.

Perfect For:

This 16-gallon waste tank is perfect for RV, camper, trailer, motorhome, or tiny house owners who need a reliable black or gray water solution. It’s made in the USA and easy to install, but remember: inlet, vent, and fittings are not included.

Ready to Purchase?

View Price on Amazon (paid link)

3. classAcustoms 28 Gallon RV Waste Black Water Holding Tank WT-2800

The Class A Customs 28 Gallon RV Waste Black Water Holding Tank is made in the USA using Medium Density Polyethylene (MDPE) Resin. It’s designed for waste or gray water only, not for fresh or drinking water.

This tank has a 3” ABS Female Pipe outlet that cannot be moved. Do not over-tighten fittings to avoid damage. Inlet and vent placement is up to the user, and hardware is not included.

The tank must be vented to allow air in and out during use. Do not pressurize the tank. Additional fittings, hardware, and piping are not included, so plan accordingly for installation.

Pros	Cons
Made in USA with durable MDPE resin for long-lasting use. 28-gallon capacity handles waste efficiently in RV or tiny homes. Pre-installed 3” ABS outlet for easy setup and quick dumping. Customizable inlet and vent placement for flexible installation.	No inlet, vent, or hardware included—you must buy and install these separately. Fixed outlet position—cannot be moved, limiting installation flexibility. Not for fresh water—strictly for waste, so double-check your needs.

Perfect For:

This 28-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water solution. It’s made in the USA and easy to install, though you’ll need to add your own inlet, vent, and fittings.

Ready to Purchase?

View Price on Amazon (paid link)

4. Class A Customs 18.5 Gallon RV Waste Black Water Holding Tank WT-1850

The Class A Customs 18.5 Gallon RV Waste Black Water Holding Tank is made in the USA from Medium Density Polyethylene (MDPE) Resin. It’s designed for waste or gray water use only, perfect for RV’s, campers, trailers, motorhomes, and tiny houses.

This tank includes a 3” ABS female pipe outlet, but inlet and vent fittings are not included. Do not pressurize the tank or over-tighten fittings, as this can cause damage. Mounting hardware and dump valves are also not included.

Pros	Cons
Made in USA with durable MDPE resin for long-lasting use. 18.5-gallon capacity handles waste efficiently for RVs and tiny homes. Pre-installed 3” ABS outlet simplifies setup for easy dumping. Customizable inlet and vent placement to fit your unique needs.	No fittings or hardware included, so you’ll need to buy extra parts. Outlet can’t be moved, limiting installation options for your setup. Not for fresh water, strictly for waste use only.

Perfect For:

This 18.5-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, making it ideal for DIY upgrades.

Ready to Purchase?

View Price on Amazon (paid link)

5. Class A Customs 27 Gallon RV Waste Black Water Holding Tank WT-2700

Class A Customs 27 Gallon RV Waste Black Water Holding Tank is made in the USA from Medium Density Polyethylene (MDPE) Resin. It’s designed for waste or gray water only, not for fresh or drinking water. Use it in RV’s, campers, trailers, motorhomes, and tiny houses.

The tank comes with a 3” ABS female pipe outlet, but inlet and vent fittings are not included. You’ll need to install these yourself and ensure the tank is vented to allow air in and out. Do not pressurize the tank or over-tighten fittings to avoid damage.

Pros	Cons
Made in USA with durable MDPE resin for long-lasting use. 27-gallon capacity handles waste efficiently for RVs and tiny homes. Pre-installed 3” ABS outlet simplifies setup for easy dumping. Customizable inlet and vent placement to fit your unique needs.	No fittings or hardware included, so you’ll need to buy extra parts. Outlet can’t be moved, limiting installation options for your setup. Not for fresh water, strictly for waste, so use carefully.

Perfect For:

This 27-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, but remember, it’s only for waste water.

Ready to Purchase?

View Price on Amazon (paid link)

6. Class A Customs 14 Gallon RV Waste Black Water Holding Tank WT-1400

The Class A Customs 14 Gallon RV Waste Black Water Holding Tank is made in the USA using Medium Density Polyethylene (MDPE) Resin. It’s designed for waste or gray water only, not for fresh or drinking water. This tank is perfect for RVs, campers, trailers, motorhomes, and tiny houses.

It comes with a 3” ABS Female Pipe outlet, but dump valves and piping are not included. The inlet and vent must be installed by the user, and the tank must be vented to work properly.

Hardware, fittings, and mounting supplies are not included. Always avoid over-tightening fittings to prevent damage. This tank is built to last and easy to install with the right tools.

Pros	Cons
Made in USA with durable MDPE resin for long-lasting use. 14-gallon capacity fits RV, camper, or tiny house needs. Pre-installed 3” ABS outlet for easy waste disposal. Customizable inlet and vent placement for flexible installation.	No fittings included, so you’ll need to buy extra parts. Can’t move the outlet, limiting installation options. Not for fresh water, strictly for waste use only.

Perfect For:

This 14-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, but remember, it’s only for waste water.

Ready to Purchase?

View Price on Amazon (paid link)

7. classAcustoms WT-3469-3H 3″ Black Water RV Waste Holding Tank 34 Gallon Concession and Camper Waste Black Gray Tank (34 Gallon)

The classAcustoms WT-3469-3H is a 34-gallon RV waste tank. It’s made in the USA using strong Medium Density Polyethylene (MDPE). This tank is only for waste or gray water, not for drinking.

It has a 3-inch ABS female pipe outlet. Do not over-tighten fittings to avoid damage. The inlet and vent must be installed by the user.

This tank is ideal for RVs, campers, and tiny houses. Hardware and fittings are not included. Check the photos for detailed dimensions.

Pros	Cons
34-gallon capacity for longer trips without frequent emptying. Durable MDPE material ensures long-lasting use. Easy installation with pre-installed 3″ outlet. Made in the USA for trusted quality.	No fittings included – You’ll need to buy extra parts. Fixed outlet – Can’t move the 3″ ABS outlet. Not for fresh water – Only for waste/gray water.

Perfect For:

This 34-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black or gray water solution. It’s made in the USA and easy to install, but remember: it’s for waste water only.

Ready to Purchase?

View Price on Amazon (paid link)

8. Class A Customs 31 Gallon RV Waste Black Water Holding Tank WT-3100

Class A Customs 31 Gallon RV Waste Black Water Holding Tank is made in the USA from Medium Density Polyethylene (MDPE) Resin. It’s designed for waste or gray water use only, perfect for RV’s, campers, trailers, motorhomes, and tiny houses.

Key features include a 3” ABS female pipe outlet, no inlet or vent fittings included, and no mounting hardware. Do not pressurize the tank or over-tighten fittings to avoid damage.

Pros	Cons
Made in USA with durable MDPE resin for long-lasting use. 31-gallon capacity handles waste efficiently for RVs and tiny homes. Pre-installed 3” ABS outlet simplifies setup and saves time. Customizable inlet and vent placement for flexible installation.	No fittings or hardware included, so you’ll need to buy extra parts. Outlet can’t be moved, limiting installation options for your setup. Not for fresh water, strictly for waste, so use carefully.

Perfect For:

This 31-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, with a 3-inch ABS outlet ready for use. Ideal for waste or gray water, it’s a must-have upgrade for your vehicle or tiny home.

Ready to Purchase?

View Price on Amazon (paid link)

9. classAcustoms WT-1766 3″ Black Water RV Waste Holding Tank 17 Gallon Concession and Camper Waste Black Gray Tank

The classAcustoms WT-1766 is a 17-gallon black water RV waste holding tank made in the USA. It’s built with Medium Density Polyethylene (MDPE) Resin for durability and reliability.

This tank is designed for waste or gray water only, not for fresh or drinking water. It includes a 3” ABS female pipe outlet but requires the user to install the inlet and vent. Hardware and fittings are not included.

Pros	Cons
17-gallon capacity for longer trips without frequent emptying. Durable MDPE material ensures long-lasting use. Easy installation with pre-installed 3″ outlet. Made in the USA for trusted quality.	No fittings or hardware included, so you’ll need to buy extra parts. Outlet can’t be moved, limiting installation options for your setup. Not for fresh water, strictly for waste, so use carefully.

Perfect For:

This 17-gallon waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black or gray water solution. It’s made in the USA and easy to install, with a 3” ABS outlet ready for use.

Ready to Purchase?

View Price on Amazon (paid link)

10. Class A Customs 38 Gallon RV Waste Black Water Holding Tank WT-3800

Class A Customs 38 Gallon RV Waste Black Water Holding Tank is made in the USA using Medium Density Polyethylene (MDPE) Resin. It’s designed for waste or gray water use only, perfect for RV’s, campers, trailers, motorhomes, and tiny houses.

Pros	Cons
Made in USA with durable MDPE resin for long-lasting use. 38-gallon capacity handles waste efficiently in RV or tiny homes. Pre-installed 3” ABS outlet for easy setup and quick dumping. Customizable inlet and vent placement for flexible installation.	No fittings included, you must buy extra parts. Can’t move the outlet, fixed position limits setup options. Not for fresh water, strictly for waste use only.

Perfect For:

This 38-gallon RV waste tank is perfect for RV, camper, trailer, motorhome, and tiny house owners who need a reliable black water holding solution. It’s made in the USA and easy to install, but remember, it’s for waste water only.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Tiny house living is all about simplicity and freedom. Choosing the right waste tank is key to a smooth experience.

Explore our guide to find the perfect tank for your tiny house adventure. Let’s make waste management easy and hassle-free!

Here are the factors to consider when buying a waste tank for your tiny house:

Size: Pick a tank size that fits your tiny house and meets your waste needs. Options range from 14 to 38 gallons.
Material: Look for tanks made from Medium Density Polyethylene (MDPE) for durability and long-lasting performance.
Compatibility: Ensure the tank is designed for waste or gray water only, not fresh water.
Outlet and Fittings: Check for a 3” ABS female pipe outlet and plan to add your own inlet, vent, and dump valve.
Installation: Make sure the tank is easy to install and fits your space. Hardware is often not included, so prepare accordingly.
Ventilation: The tank must be vented to work safely and allow air in and out.
Durability: Avoid over-tightening fittings and pressurizing the tank to prevent damage.

With these factors in mind, you’ll find the best waste tank for your tiny house lifestyle!