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When your RV holding tank develops a crack, starts leaking, or fails completely, you need an exact-dimension replacement. This 39-gallon tank from Elkhart Plastics/Ameri-Kart (Part 449H) measures 60" x 24 3/8" x 8 3/4" — the right fit for coaches originally built to that specific footprint. This is a discontinued product; we are selling through remaining stock. If the dimensions match your bay, order now.
Features & Specifications
- Capacity: 39 gallons
- Dimensions: 60" x 24 3/8" x 8 3/4"
- Part Number: 449H
- Manufacturer: Elkhart Plastics / Ameri-Kart — one of the primary OEM holding tank suppliers to North American RV manufacturers
- Material: Polyethylene — chemically resistant to waste compounds and suitable for extended use as gray or black water tanks
- Profile: Wide, low-profile shape (only 8 3/4" tall) suited for shallow underbelly bays in larger coach chassis
- Status: Discontinued — limited final inventory remaining
Why Choose the 449H for Your RV?
Holding tank replacement is one of the most dimension-critical repairs in RV service. A tank that's off by an inch in any direction may not seat properly, may stress your plumbing connections, or may not pass through the access opening in the chassis. The 449H is the OEM-specification replacement for the exact footprint it was designed to fill.
Elkhart Plastics and Ameri-Kart supply the majority of OEM tanks to RV manufacturers in Indiana. Using the same manufacturer means the same polyethylene formulation, wall thickness, and fitting-hole placement as your original. That matters when you're reusing existing spinweld fittings or level sensors from the old tank.
Who Is This Tank For?
This tank suits DIY owners and professional RV technicians replacing a failed tank in a coach that originally used the 449H footprint. Before ordering: measure your existing tank exterior — length, width, and height in inches — and confirm it matches 60" x 24 3/8" x 8 3/4". If you can locate the part number stamped on the old tank, that's the fastest way to confirm compatibility. If your bay is deeper or narrower, browse our other RV holding tank sizes. This part does not fit coaches that require a taller or shorter tank profile.
Compare RV Holding Tanks
Not sure which size is right for your coach? Here's how the 449H compares to other tanks we carry:
| Tank / Part # | Capacity | Dimensions (L x W x H) | Profile | View Details |
|---|---|---|---|---|
| Elkhart Plastics 449H | 39 Gal | 60" x 24 3/8" x 8 3/4" | Wide low-profile; discontinued final stock | Current Product |
| EPI 449M — 20 Gallon | 20 Gal | 60" x 20" x 6" | Slim low-profile; smaller coaches | View Details |
| 35 Gallon Tank | 35 Gal | 24" x 22" x 20 1/4" | Tall deep-bay configuration | View Details |
| 40 Gallon Tank | 40 Gal | 58" x 38" x 5 1/4" | Very flat wide-frame coaches | View Details |
Tip: Measure your existing tank before ordering. Part number (stamped into the tank body) is the most reliable identification method — it removes all guesswork about which replacement to buy.
Technical Specifications
| Capacity | 39 Gallons |
| Length | 60" |
| Width | 24 3/8" |
| Height | 8 3/4" |
| Part Number | 449H |
| SKU | 449H |
| Barcode | 28518459 |
| Manufacturer | Elkhart Plastics / Ameri-Kart |
| Material | Polyethylene |
| Application | Gray water or black water holding tank |
| Availability | Discontinued — limited final stock |
What's Included
- 1x Elkhart Plastics 39-gallon polyethylene holding tank (Part 449H)
- Not included: Spinweld fittings, drain plugs, probe patches, and mounting hardware. Reuse your existing fittings if in good condition, or browse our RV tank fittings to replace them.
Compatible Models & Alternatives
The 449H is a dimensional replacement for coaches originally built with this exact footprint. If your tank has a different profile, our full RV holding tank collection carries multiple capacities and footprints. To complete the installation you may need spinweld fittings, a drain plug, or a level sensor patch.
Frequently Asked Questions
- How do I confirm this tank fits my RV?
- Measure your existing tank exterior: length, width, and height. They should match 60" x 24 3/8" x 8 3/4". Even faster: find the part number stamped into the existing tank. If it reads 449H, this is your direct replacement.
- Is this a gray water or black water tank?
- Either. The tank itself is a plain polyethylene vessel — whether it becomes gray or black water is determined by which waste line in your RV connects to it. Verify your plumbing before ordering if you're unsure.
- Do I need new fittings when I replace the tank?
- Not necessarily. If your existing spinweld fittings are undamaged, you can typically reuse them. If they show cracks, deformation, or stripped threads, replace them. We stock 2", 3", and 4" spinweld fittings in our tank fittings section.
- Why does it say "Discontinued"?
- Elkhart Plastics/Ameri-Kart no longer produces the 449H. We are selling through our remaining stock — 10 units as of this listing. When they're gone, this part won't be restocked. Order promptly if your measurements match.
- Can I install this myself?
- Yes, with preparation. Holding tank replacement typically involves dropping the belly wrap, disconnecting existing plumbing and sensors, removing the old tank, and reversing for the new one. A second person and a floor jack to support the tank weight are strongly recommended. Allow a full day for the job.
Why Buy from Elkhart RV Parts?
We're based in Elkhart, Indiana — the center of North American RV manufacturing. We stock discontinued and hard-to-find holding tanks precisely because these parts are difficult to source elsewhere once a model stops production. When you order from us, you're getting real stock from a warehouse that specializes in RV parts, not a marketplace reseller guessing at availability.
| QAI Certification | REC 559-1 |
|---|---|
| Part number | 449H |
| Capacity (gallons) | 39 |
| Dimensions (inches) | 60 x 24 3/8 x 8 3/4 |
| Lead time | 4-12 weeks |
| Best for | Custom RV holding tank replacement |
- What are the dimensions of the 39 gallon rv holding tank? The dimensions of the 39 Gallon RV Holding Tank are 60 inches in length, 24 3/8 inches in width, and 8 3/4 inches in height.
- Is there a minimum order quantity for this rv holding tank? Yes, there is a minimum order of 10 tanks for this product.
- How long is the production timeframe for this custom made holding tank? The estimated production timeframe for this custom made tank is between 4 to 12 weeks.
- Can i return or get a refund on this rv holding tank if i change my mind? No, due to this being a custom order, there are no returns and no refunds available.
- Who is the vendor or manufacturer of this 39 gallon rv holding tank? The vendor for this holding tank is Elkhart Plastics/Ameri-Kart.
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.