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20 Gallon RV Black Water Holding Tank - Compact Space-Saving Design
Maximize your RV's efficiency with this professional-grade 20-gallon black water holding tank from Elkhart Plastics Industries (EPI). Engineered specifically for compact motorhomes, Class B camper vans, travel trailers, and space-conscious RV builds, this heavy-duty waste tank delivers reliable performance in a smaller footprint perfect for weekend camping and short-term adventures.
Key Features & Benefits
- Compact 20-Gallon Capacity: Ideal size for smaller RVs, camper vans, teardrop trailers, and weekend camping setups
- Space-Efficient Dimensions: 23¾" L x 19" W x 13⅝" H designed for tight installations and custom RV builds
- Heavy-Duty HDPE Construction: Premium high-density polyethylene resists cracking, warping, chemical damage, and UV degradation
- Leak-Proof Seamless Design: One-piece construction prevents costly leaks and eliminates odor issues
- Lightweight Installation: Only 46 pounds for easier handling and installation in confined spaces
- OEM Quality: EPI quality trusted by major RV manufacturers and service centers nationwide
- Made in USA: American-manufactured quality and reliability you can trust
Technical Specifications
- Capacity: 20 gallons (76 liters)
- Dimensions: 23.75" L x 19" W x 13.625" H (60cm x 48cm x 35cm)
- Weight: 46 pounds
- Material: High-density polyethylene (HDPE)
- Part Numbers: EPI 1299, H1324001, 1299H
- Manufacturer: Elkhart Plastics Industries (EPI)
- Origin: Made in USA
- Color: Black
- Type: Black water holding tank
Perfect Applications for This Compact RV Tank
This 20-gallon holding tank is the ideal solution for:
- Class B motorhomes and camper vans with limited space
- Small travel trailers and pop-up campers
- Teardrop trailers and micro RVs
- Weekend warrior camping setups
- Replacement for damaged or leaking compact tanks
- Custom RV builds with space constraints
- Van conversions and DIY camper projects
- Toy haulers and lightweight trailers
Why Choose Elkhart Plastics Industries (EPI) Tanks?
Elkhart Plastics Industries has been the trusted leader in RV tank manufacturing for decades. EPI tanks are:
- Used as OEM equipment by major RV manufacturers including Forest River, Jayco, and Thor
- Rigorously tested for durability, leak resistance, and long-term performance
- Backed by industry-leading quality standards and manufacturing processes
- Designed specifically for the demanding RV environment and extreme temperatures
- Engineered for maximum space efficiency without compromising capacity
- Manufactured in the USA with premium materials and strict quality control
Installation & Compatibility
Professional installation is recommended for proper mounting and plumbing connections. This tank includes standard fittings and mounting points for easy replacement of existing units. The compact design makes it easier to maneuver during installation in tight RV spaces. Compatible with standard RV waste systems, dump valves, and plumbing fittings. Ensure proper venting and secure mounting for optimal performance.
Maintenance & Care Tips
Regular maintenance will extend tank life and prevent odors:
- Use only RV-safe holding tank chemicals and treatments
- Flush tank thoroughly after each dump to prevent buildup
- Inspect fittings and seals regularly for leaks
- Avoid harsh chemicals that can damage polyethylene
- Store RV with tank empty and clean during off-season
- Check mounting straps and hardware periodically
Frequently Asked Questions
Q: How long will a 20-gallon black water tank last for weekend camping?
A: For 2 people on a weekend trip (2-3 days), a 20-gallon tank typically provides adequate capacity with normal use. Actual duration depends on usage habits and conservation practices.
Q: Is this tank compatible with my RV model?
A: This tank fits many compact RVs, Class B motorhomes, and small trailers. Verify dimensions (23.75x19x13.625) match your available space and mounting configuration before ordering.
Q: What's the difference between black water and gray water tanks?
A: Black water tanks hold toilet waste, while gray water tanks hold sink and shower drainage. This is a black water tank designed for toilet waste storage.
Q: Can I use this tank for gray water instead?
A: Yes, this tank can be used for gray water applications if dimensions and fittings are compatible with your system.
Q: Does this tank come with fittings and hardware?
A: Tank includes standard mounting points. Fittings, valves, and mounting hardware are typically sold separately or reused from existing installation.
Space-Saving Solution for Compact RVs
Perfect for RVers who prioritize space efficiency without sacrificing quality and reliability. This 20-gallon capacity provides adequate waste storage for weekend trips and short-term camping adventures while maximizing your RV's interior space for comfortable living. The compact footprint makes it ideal for van conversions, teardrop trailers, and custom builds where every inch counts.
🚚 Fast Shipping from Multiple US Facilities
Order your authentic EPI 20-gallon RV black water holding tank today and enjoy reliable waste management for your compact RV adventures. Questions? Use our AI Live Chat for expert product assistance and compatibility help.
| Material | Black polyethylene |
|---|---|
| Width (inches) | 19 |
| Height (inches) | 13.625 |
| Length (inches) | 23.75 |
| Capacity (gallons) | 20 |
| Wall thickness (inches) | 0.18 |
| Outlet diameter (inches) | 3 |
- What are the dimensions of the 20 gallon rv holding tank? The dimensions of the tank are 23 3/4 inches in length, 19 inches in width, and 13 5/8 inches in height.
- Is the 20 gallon rv holding tank pre-fitted with outlet fittings? No, the tank comes blank with no fittings. Fittings can be added upon request with a quote.
- What material is the holding tank made from? The tank is made from black polyethylene with a wall thickness of 0.180 inches.
- What is the purpose of the sealed hole on top of the tank? The sealed hole on top of the tank is a venting hole used during the manufacturing process and has no functional use for the end-user.
- How is the tank manufactured to ensure durability? The tank is manufactured using roto-molding, which creates a seamless tank with walls of equal thickness, making it strong and durable.
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.


