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Premium 40 Gallon RV Holding Tank - OEM Quality You Can Trust
This 40-gallon RV holding tank from Elkhart Plastics (Part# EPI 3018, H1067) delivers the same OEM-grade quality found in factory-built RVs. Measuring 63" x 24" x 8", this seamless roto-molded tank is engineered for reliable black water or gray water storage in travel trailers, fifth wheels, and motorhomes.
Manufactured in the USA with high-density polyethylene (HDPE), this holding tank features 0.180-inch thick walls for exceptional durability and impact resistance. The blank tank design allows you to customize fittings to match your specific RV configuration, making it perfect for replacement installations or custom builds.
Why Choose This Elkhart Plastics Holding Tank?
OEM Manufacturing Standards - Built to the exact specifications used by major RV manufacturers, ensuring factory-quality performance and longevity.
Seamless Roto-Molded Construction - One-piece design eliminates weak points and potential leak areas, providing superior strength and reliability over welded alternatives.
Heavy-Duty HDPE Material - High-density black polyethylene resists cracking, warping, and chemical degradation from waste treatment products.
Blank Tank Flexibility - Customize your fitting placement for drain outlets, vents, and sensors to perfectly match your RV's plumbing layout.
Proven Track Record - Elkhart Plastics has been the trusted supplier for RV manufacturers for decades, with millions of tanks in service across North America.
Technical Specifications
- Capacity: 40 gallons
- Dimensions: 63" Length x 24" Width x 8" Height
- Material: High-density black polyethylene (HDPE)
- Wall Thickness: 0.180 inches
- Weight: 33 lbs (empty)
- Outlet Size: 3 inches (standard)
- Construction: Seamless roto-molded
- Part Numbers: EPI 3018, H1067
- Barcode: 71444539
- Country of Origin: USA
Perfect Applications & Compatibility
This 40-gallon holding tank is ideal for:
- Travel trailer black water or gray water replacement
- Fifth wheel waste tank upgrades
- Motorhome holding tank restoration
- Custom RV builds requiring specific dimensions
- Camper renovation projects
- RVs with 63" x 24" x 8" tank compartment space
The blank tank design allows you to install custom fittings including drain outlets, vent connections, and level sensors exactly where you need them. This flexibility makes it compatible with virtually any RV plumbing configuration.
Compare Similar 40 Gallon Holding Tanks
| Model | Dimensions (L x W x H) | Capacity | Part Numbers | Best For | View Details |
|---|---|---|---|---|---|
| Elkhart Plastics (Current) | 63" x 24" x 8" | 40 Gallons | EPI 3018, H1067 | Standard width RVs | You're viewing it! |
| Alpha VR28598HRBLANK | 59" x 28" x 8" | 40 Gallons | VR28598HRBLANK | Wider compartments | View Product |
| Alpha VR28598HLBLANK | 59" x 28" x 8" | 40 Gallons | VR28598HLBLANK | Left-side drain config | View Product |
| Alpha VB24637HL | 63" x 25" x 7" | 40 Gallons | VB24637HL | Shallower height needs | View Product |
💡 Helpful Tip: Measure your RV's tank compartment carefully before ordering. Even small dimension differences can affect fitment. If you're unsure which tank fits your RV, use our AI Live Chat for personalized assistance.
Complete Your Installation
Don't forget the essential components for a professional installation:
- Universal Holding Tank Fittings Kit with Level Sensors - Complete kit with drain fittings, vents, and sensors for black/gray water tanks
- Tank mounting hardware and straps (ensure secure installation)
- Proper sealants and gaskets for leak-free connections
- Waste treatment chemicals compatible with polyethylene tanks
Browse our complete selection of RV holding tanks or explore replacement parts and fittings to complete your project.
What Makes Elkhart Plastics the Industry Standard?
Elkhart Plastics has been manufacturing RV holding tanks since the industry's early days, supplying OEM tanks to virtually every major RV manufacturer. When you choose an Elkhart Plastics tank, you're getting the same quality that comes factory-installed in new RVs - not an aftermarket imitation.
Their seamless roto-molding process creates tanks with uniform wall thickness and no weak seams or welds. The high-density polyethylene material resists UV degradation, chemical damage, and impact - critical factors for components that spend years exposed to harsh conditions and aggressive waste treatment chemicals.
Installation Considerations
This blank tank arrives without pre-installed fittings, giving you complete control over your installation. You'll need to drill holes and install appropriate fittings for:
- Drain outlet - Typically 3" termination fitting on the bottom
- Vent connection - Usually 1.5" vent fitting on top (manufacturing vent hole included)
- Inlet connection - 3" or 4" inlet from toilet or gray water sources
- Level sensors - Optional tank monitoring system probes
Professional installation is recommended to ensure proper fitting placement, secure mounting, and leak-free connections. Always follow local codes and RV industry best practices.
Frequently Asked Questions
What's the difference between a black water and gray water holding tank?
This tank can serve either purpose - the difference is in what you connect to it. Black water tanks receive waste from toilets, while gray water tanks collect drainage from sinks and showers. The tank construction is identical; it's the plumbing connections that determine its use.
How do I know if this tank will fit my RV?
Measure your existing tank compartment carefully - length, width, and height. This tank measures exactly 63" x 24" x 8". You'll need at least these dimensions, plus a few extra inches for installation clearance and fittings. If you're unsure, our AI Live Chat can help verify compatibility.
Does this tank come with fittings and sensors?
No, this is a blank tank that allows you to customize fitting placement for your specific installation. We recommend our Universal Holding Tank Fittings Kit which includes everything you need.
Is this tank compatible with all waste treatment chemicals?
Yes, the high-density polyethylene construction is resistant to all common RV waste treatment chemicals, including formaldehyde-free and enzyme-based products.
What's the warranty on this holding tank?
As an OEM-grade component, this tank is built to last the lifetime of your RV. We stand behind the quality with our standard return policy, and the tank's proven track record in factory installations speaks to its durability.
Order Your OEM-Grade Holding Tank Today
Replace your failing holding tank with genuine OEM quality from Elkhart Plastics. With fast shipping and expert support, we make it easy to restore your RV's waste system to like-new condition. Questions about fitment or installation? Our AI Live Chat is available to help you find the perfect solution for your RV.
🚚 Fast Shipping - Most orders ship within 1-2 business days
✓ Expert Support - AI Live Chat available for product questions and fitment help
| Material | Black polyethylene |
|---|---|
| Width (inches) | 24 |
| Height (inches) | 8 |
| Length (inches) | 63 |
| Weight (pounds) | 33 |
| Capacity (gallons) | 40 |
| Outlet size (inches) | 3 |
| Wall thickness (inches) | 0.18 |
- What are the dimensions of the 40 gallon rv holding tank? The tank measures 63 inches in length, 24 inches in height, and 8 inches in width.
- Is the 40 gallon rv holding tank ready to use with fittings installed? No, this is a blank tank with no fittings. Fittings can be added upon request and quote.
- What material is the holding tank made of? The tank is made from black polyethylene with a wall thickness of 0.180 inches.
- Does the sealed hole on top of the tank serve any purpose? No, the sealed hole on top is a venting hole used during manufacturing and has no functional use for the end-user.
- Are returns accepted for this holding tank? All tank sales are final as these are custom products, so returns are not accepted.
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.