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Premium 31 Gallon RV Black Water Holding Tank - Built to Last
This 31 gallon RV holding tank (34" x 19.5" x 13") is engineered for superior durability and long-term performance in your RV waste management system. Featuring industry-leading wall thickness and professional-grade construction, this tank outperforms standard competitors' tanks and delivers years of reliable service.
Key Specifications
- Capacity: 31 gallons
- Dimensions: 34" L x 19.5" W x 13" H
- Wall Thickness: .1875" to .20" (up to 60% thicker than competitors)
- Material: Roto-molded black polyethylene
- Drain Outlet: 3" hub included
- Probes: Included for level monitoring
- Configuration: Blank tank (custom fittings available)
- Part Numbers: EPI 4848, 4848H, H1017, ERV121000, T4848, T4848H31
- SKU: 4848
- Weight: 64 lbs
Why Choose Elkhart Plastics Holding Tanks?
Superior Wall Thickness: While competitors' tanks have wall thickness ranging from .125" to .150", our tanks feature .1875" to .20" walls - up to 60% thicker for maximum durability and leak prevention. We build our tanks to last!
Professional Roto-Molded Construction: Manufactured using advanced rotational molding in durable black polyethylene for consistent wall thickness, superior strength, and resistance to cracking or warping. Seamless one-piece construction eliminates weak points and potential leaks.
Versatile Waste Storage: Designed for both black water (solids and wastewater) and gray water applications, giving you flexibility in your RV plumbing configuration.
Made in USA: Elkhart Plastics (EPI) has been the trusted name in RV holding tanks for decades, with rigorous quality control standards and UV-resistant materials that won't degrade in sunlight.
Compare Similar Holding Tanks
| Model | Capacity | Dimensions (LxWxH) | Wall Thickness | Best For | View Details |
|---|---|---|---|---|---|
| Elkhart 31 Gal (4848) | 31 gallons | 34" x 19.5" x 13" | .1875"-.20" | Compact installations, maximum strength | Current Product |
| Elkhart 31 Gal (H1235005) | 31 gallons | 27.5" x 20.5" x 18.5" | .180" | Taller, narrower footprint | View Details |
| Elkhart 29 Gal (H1296) | 29 gallons | 45" x 15.5" x 12.375" | .180" | Longer, narrower design | View Details |
| Elkhart 30 Gal (H1259) | 30 gallons | 60" x 28" x 6.125" | .180" | Low-profile, wide installations | View Details |
| Elkhart 35 Gal (4894) | 35 gallons | 54" x 32" x 8" | .180" | Larger capacity, low-profile | View Details |
💡 Pro Tip: Always measure your existing tank compartment carefully before ordering. Consider outlet location, mounting points, and clearance for vent and sensor fittings. The extra-thick walls on this tank provide superior durability worth the investment.
Perfect For These RV Applications
This 31 gallon holding tank is ideal for travel trailers, fifth wheels, motorhomes, and campers requiring a compact yet robust waste storage solution. The 34" x 19.5" x 13" footprint fits standard RV underbelly compartments while maximizing capacity.
- Black water holding tank replacement
- Gray water holding tank upgrade
- Travel trailer waste system repair
- Fifth wheel plumbing renovation
- Motorhome holding tank replacement
- Custom RV build projects
- Commercial RV fleet maintenance
Installation & Customization
This blank tank allows you to add fittings exactly where you need them for your specific RV layout. The tank includes a 3" drain outlet hub and probes for level monitoring. Need custom fittings? We can add inlet fittings, vent fittings, and drain configurations to match your exact requirements.
Complete Your Installation
Make sure you have everything you need for a professional installation:
- Universal Holding Tank Fittings Kit with Level Sensors - Complete kit with sensors for monitoring tank levels
- 3" Barbed Coupler for RV Holding Tanks - Essential fitting for secure connections
Other Elkhart Plastics Holding Tank Sizes
Need a different size or configuration? We carry a complete range of Elkhart Plastics holding tanks:
- 29 Gallon Holding Tank (60x28x7) - Low-profile option
- 30 Gallon Holding Tank (54x22x8) - Mid-size alternative
- 31 Gallon Holding Tank (27.5x20.5x18.5) - Taller cube design
- 35 Gallon Holding Tank (54x32x8) - Larger capacity option
Frequently Asked Questions
Q: Will this tank fit my RV?
A: Measure your available space carefully. This tank is 34" x 19.5" x 13". If your space matches or exceeds these dimensions, it will fit. Use our AI Live Chat for instant fitment assistance.
Q: What's the difference between black water and gray water tanks?
A: This tank works for both! Black water tanks store toilet waste, while gray water tanks store sink/shower drainage. The tank construction is identical - only the plumbing connections differ.
Q: How do I add fittings to this blank tank?
A: You can drill and install threaded fittings yourself, or contact us for professional fitting installation. We offer custom fitting placement to match your exact RV specifications.
Q: Is this tank better than cheaper alternatives?
A: Absolutely. Our .1875"-.20" wall thickness vs competitors' .125"-.150" means 60% more material for superior strength, crack resistance, and longevity. You'll replace cheap tanks multiple times before this one fails.
Q: What part number do I need?
A: This tank has multiple part numbers: 4848, 4848H, H1017, ERV121000, T4848, T4848H31. They all refer to this same 31 gallon tank.
Q: Where can I get help with installation or product questions?
A: Use our AI Live Chat for instant product assistance and expert guidance on compatibility, sizing, and installation.
What's Included
- 1x 31-gallon roto-molded holding tank
- 3" drain outlet hub
- Level monitoring probes
- Elkhart Plastics quality certification
Why Buy From Elkhart RV Parts?
- ✓ Authorized dealer for Elkhart Plastics - 100% authentic OEM parts
- ✓ Fast shipping from our U.S.-based warehouse
- ✓ Expert product knowledge and support via AI Live Chat
- ✓ Competitive pricing on premium RV components
- ✓ Trusted by RV owners and professional technicians nationwide
- ✓ Superior wall thickness - up to 60% thicker than competitors
Ready to upgrade your RV's waste system with a tank that's built to last? Order your premium 31 gallon holding tank today.
| Material | Black polyethylene |
|---|---|
| Width (inches) | 19.5 |
| Height (inches) | 13 |
| Length (inches) | 34 |
| Capacity (gallons) | 31 |
| Wall thickness (inches) | 0.1875 to 0.20 |
| Outlet diameter (inches) | 3 |
- What is the capacity of the rv holding tank? The RV holding tank has a capacity of 31 gallons.
- What are the dimensions of this holding tank? The dimensions of the tank are 34 inches in length, 19 1/2 inches in width, and 13 inches in height.
- Does the tank come with fittings included? No, the tank is blank with no fittings included. Fittings can be added based on a quote.
- What material is the holding tank made of? The tank is roto-molded from durable black polyethylene.
- What size is the outlet on the holding tank? The holding tank features a 3-inch outlet hub.
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.