Finding a reliable black water tank for motorhomes, RVs, and campers is essential for sanitary waste management on the road. This guide highlights five dependable options, focusing on leak-proof construction, proper discharge configurations, and compatibility with standard RV waste systems. Each product is evaluated by capacity, mounting considerations, and installation notes to help you choose the right tank for your rig.
Summary Table of Selected Products
| Product | Brand | Capacity | Discharge Type | Notes |
|---|---|---|---|---|
| Ameri-Kart 30 Gallon Black Water Tank | Ameri-Kart | 30 Gallons | End Discharge | Made in USA; 3″ outlet; leak-proof; multiple sensor probes |
| Ameri-Kart 34 Gallon Black Water Tank | Ameri-Kart | 34 Gallons | End Discharge (Left) | Made in USA; easy install; sensor probes |
| Ameri-Kart 39 Gallon Black Water Tank | Ameri-Kart | 39 Gallons | End Discharge | Leak-proof; durable plastics; sensor probes |
| classAcustoms WT-1653 16 Gallon | classAcustoms | 16 Gallons | 3” ABS Outlet | MDPE resin; end-user inlet/vent placement |
| classAcustoms WTSD-4000HRC 40 Gallon | classAcustoms | 40 Gallons | 3” ABS Outlet | MDPE resin; vented; user installs inlet/vent |
Ameri-Kart 30 Gallon Black Water Tank
The Ameri-Kart 30 Gallon Black Water Tank is designed for toilets, sinks, and showers in RVs, motorhomes, trailers, campers, and tiny houses. It is manufactured in the USA with weather- and impact-resistant plastics to resist leaks and provide long service life. Its 3″ end discharge outlet supports straightforward installation, with inlet and vent locations determined by the installer. Sensor probes for high, medium, and low water levels aid monitoring during operation. Built to IAPMO standards, this tank emphasizes durability and leak prevention across a range of mobile living setups.
Ameri-Kart 34 Gallon Black Water Tank
The 34 Gallon Ameri-Kart tank shares the same leak-proof design as the 30-gallon model, offering a larger capacity for longer trips. The 3″ end discharge outlet is customizable during installation, with inlet and vent placements determined by the user. High, medium, and low sensors provide water-level information, helping prevent overflows and facilitating timely maintenance. Made in the USA with durable plastics, this tank is engineered for extended use in motorhomes, RVs, and tiny houses alike, meeting industry standards for safety and reliability.
Ameri-Kart 39 Gallon Black Water Tank
The 39 Gallon option from Ameri-Kart provides an expansive holding capacity for heavier use scenarios. Like the other models, it features a 3″ end discharge outlet and customizable inlet/vent placement, along with multi-level sensor probes to monitor waste levels. The tank is constructed from weather- and impact-resistant plastics and adheres to IAPMO standards, ensuring durability and a long service life in motorhomes and related RV configurations.
classAcustoms WT-1653 16 Gallon Black Water Tank
Class A Customs’ WT-1653 is a 16-gallon black water tank designed for RVs, campers, trailers, motorhomes, and tiny houses. It uses MDPE resin for durability and weather resistance. The tank is intended for waste/gray water only and requires the user to determine inlet and vent placement during installation. It features a 3″ ABS outlet and emphasizes venting to prevent pressure buildup, with standard hardware not included. This option is suitable for compact setups where space efficiency is a priority.
classAcustoms 28 Gallon Black Water Tank WT-2800
With a 28-gallon capacity, this Class A Customs tank is built from MDPE resin and designed for waste/gray water only. Like other items from this brand, it uses a 3″ ABS outlet and requires the end user to install the inlet and vent. The emphasis remains on proper venting to avoid airlock and ensure smooth operation. It is compatible with RVs, campers, trailers, motorhomes, and tiny houses seeking a compact yet durable holding solution.
Class A Customs 14 Gallon Black Water Tank WT-1400
The WT-1400 offers a smaller 14-gallon capacity for tight setups where space is limited. It uses MDPE resin and a 3″ ABS outlet, with end-user responsibility for inlet and vent installation. The design prioritizes vented operation to prevent pressure issues and maintains a focus on safe, durable construction for RVs, campers, trailers, and tiny houses that require a compact black water solution.
classAcustoms WTSD-4000HRC 40 Gallon Black Water Tank
The WTSD-4000HRC provides a robust 40-gallon capacity for larger motorhomes and RVs. It uses MDPE resin and features a 3″ ABS outlet with the end-user determining inlet and vent placement. Venting is required to prevent air buildup, and the design emphasizes the typical Class A Customs approach to reliability and durability in waste management systems for mobile living environments.
Buying Guide: Key Purchase Considerations for Motorhome Black Water Tanks
- Capacity vs. space: Larger tanks reduce the frequency of dumping but require more space. Choose a capacity that matches your typical travel duration and waste output.
- Discharge configuration: End discharge versus side discharge affects installation routing and compatibility with your RV plumbing layout. Ensure the outlet orientation aligns with your needs.
- Materials and durability: MDPE and high-quality plastics offer weather resistance and impact resistance, reducing the risk of cracks or leaks during travel and vibrations.
- Vent and inlet placement: Many tanks rely on user-determined inlet/vent locations. Confirm you have access to appropriate mounting space and that the chosen tank supports your intended install plan.
- Sensor options: Multi-level sensors (high/medium/low) help monitor waste levels, aiding maintenance decisions and preventing overflows on the road.
- Code compliance and standards: Tanks built to IAPMO or equivalent standards ensure compatibility with common RV plumbing codes and safety expectations.
- Replacement considerations: If you’re upgrading, verify mounting dimensions (length x width x height) and outlet size to ensure a proper retrofit.
- Installation complexity: Some tanks require hardware not included (valves, brackets, fittings). Plan for the necessary accessories and tools before purchase.
- Maintenance and warranty: Look for leak-proof design, robust seals, and a manufacturer warranty that covers typical RV wear and outdoor exposure.
- Compatibility with existing systems: Check that the tank’s outlet size and discharge type align with your current wastewater lines to avoid compatibility issues.
Choosing the right black water tank for a motorhome involves balancing capacity, install flexibility, and long-term reliability. The models listed provide a range of capacities and configurations to suit different floorplans and travel habits, all prioritizing leak resistance and durable construction. When in doubt, measure your vehicle’s available space and consult an RV professional to confirm fit and mounting requirements.