Duraflex Gator® 38-Gallon Portable Waste Tank 21904

Duraflex Gator® 38-Gallon Portable Waste Tank

Extra-Large Wheeled RV Waste Holding Tank (SKU: 21904G)

The Duraflex Gator 38-Gallon Portable Waste Tank is the largest-capacity tote in the Gator lineup, designed for RVers who want maximum waste capacity with minimal dump trips. Manufactured by Duraflex, this tank is built from rugged, UV-stabilized high-density polyethylene to handle heavy loads, frequent towing, and outdoor exposure.

With a massive 38-gallon capacity, a four-wheel design, and an integrated tow handle, this Gator tank is ideal for long stays, full-time RVers, and large motorhomes or fifth wheels. It allows you to empty onboard holding tanks without breaking camp, making waste management more efficient and far less labor-intensive.

Features & Benefits

Key Features

• 38-gallon portable waste holding tank
• Heavy-duty, UV-stabilized HDPE construction
• Four-wheel design for improved stability when towing
• Built-in tow handle for controlled movement
• Vented outlet for smooth, controlled dumping
• Designed for frequent, high-capacity RV use

Benefits

• Maximum capacity reduces dump station trips
• Four wheels provide better balance and control
• Eliminates heavy lifting of large waste volumes
• Ideal for extended stays and full-time RVing
• Durable construction resists leaks, cracks, and odors

Fits These Applications

• Large travel trailers
• Fifth wheels
• Motorhomes (Class A, B, and C)
• RVs without full-hookup campsites
• Extended dry-camping and seasonal setups
• High-usage portable toilet systems

Common Issues This Tank Solves

• Frequent dumping due to small portable tanks
• Limited onboard waste capacity during long stays
• Heavy lifting with undersized waste totes
• Need to dump waste without moving large RVs
• Inconvenient or time-consuming waste management

Replaces / Also Known As

• Duraflex Gator 21904G
• Gator 38-gallon portable waste tank
• Extra-large RV waste tote
• High-capacity portable RV holding tank

What’s Included

• One (1) Duraflex Gator 38-Gallon Portable Waste Tank
• Four integrated wheels
• Built-in tow handle
• Inlet and outlet fittings
• Retention caps and plugs as configured

Installation & Use Overview

• No assembly required
• Connect inlet to RV sewer outlet or portable toilet
• Tow tank to dump station using handle and wheels
• Empty using vented outlet for steady flow
• Rinse thoroughly and store after use

Frequently Asked Questions

Does this tank have four wheels?

Yes. The 38-gallon model uses a four-wheel design for improved stability and easier towing when fully loaded.

Is 38 gallons too large for standard campsites?

No. While large, it’s ideal for extended stays, full-timers, and high-capacity RVs where fewer dump trips are preferred.

Can this tank handle black and gray water?

Yes. It is suitable for both gray and black water, depending on your setup.

Is it hard to move when full?

The four-wheel layout and tow handle make the tank manageable even at full capacity, especially on paved or compacted campground surfaces.

Will this fit in RV storage?

Because of its size, this tank requires large exterior storage space. Measuring before purchase is recommended.

Should I choose this over a 29-gallon tank?

Choose the 38-gallon tank if you want the fewest dump trips possible and have the storage space to accommodate it.