Skip the campground shuffle. The Camco Rhino 39004 lets you drain your gray and black water tanks directly into a portable 28-gallon HDPE tote and wheel it to the nearest dump station -- no unhooking, no repositioning, no hassle. Built tough with no-flat wheels, a sloped interior floor, and a complete accessory kit, it is the most capable tote tank in the Rhino lineup for extended stays and boondocking trips.
Whether you are parked at a site without a sewer hookup, camped in a large campground where the dump station is a long drive away, or extended boondocking on BLM land, the Rhino 39004 gives you a practical solution. Connect your sewer hose to your RV's drain, fill the tote, then roll or tow it to the dump station at your leisure.
The tank is blow-molded from UV-stabilized high-density polyethylene (HDPE) -- the same food-safe, impact-resistant material used in municipal and marine waste handling. The interior is smooth and sloped toward the drain so waste empties fully and residue doesn't accumulate in corners.
Heavy-duty no-flat wheels roll smoothly over gravel, grass, and pavement. Sealed bearings keep rolling resistance low even under a full 28-gallon load.
Built-in rinse port accepts any standard garden hose. A backflow preventer protects your water supply, and the multi-directional spray head cleans interior walls thoroughly.
A sturdy gate valve controls flow at the drain end. Open it fully for fast emptying; the sloped interior floor ensures near-complete evacuation every time.
The heavy-duty handle lets you pull it like a suitcase or attach a steel tow adapter for golf-cart towing at slow speed. A built-in ladder hook stores it neatly on your RV's rear ladder.
Camco designed the Rhino 39004 so the fill port sits only 12.5 inches from the ground -- low enough to connect a standard sewer hose from most RVs without a ramp or adapter block. The overall footprint is 36.5 x 20 inches and just 9.5 inches tall (without wheels), so it slides under slideouts and tucks into pass-through storage bays.
The ladder hook base measures 5 x 3 inches with a 2.5-inch-wide hook opening -- sized to fit standard RV ladder rungs. The hook clamps the tank securely for travel storage and keeps it off the ground between uses.
The blow-molded HDPE interior has no seams, grooves, or ledges where waste or odor-causing bacteria can accumulate. Combined with the integrated rinser and TST orange drop-in deodorizers included in the kit, cleanup is fast and odor is controlled.
The 39004 ships as a complete kit. You do not need to source additional hoses or adapters to get started:
The steel tow adapter allows you to tow the Rhino behind a golf cart or similar slow-speed vehicle. Always tow at walking speed or slower on flat, clear ground. Do not tow on public roads or at vehicle speeds.
The 28-gallon size is the largest in the Rhino portable tank lineup, making it well-suited for:
If 28 gallons is more than you need, Camco also offers the Rhino in 15-gallon (39006) and smaller configurations. The 28-gallon tank weighs 37.5 lbs empty; at approximately 8.3 lbs per gallon of water equivalent, a full tank approaches 270 lbs -- the no-flat wheel and handle system is designed for this load, but plan your dump route on paved or firm surfaces.
Pair the Rhino 39004 with additional RhinoExtreme hose sections (sold separately) if your site-to-tank run exceeds 3 feet, or add a Camco RhinoFLEX 90-degree bayonet elbow for tight sewer port angles. All Rhino hose fittings use the standard bayonet/lug system for quick, tool-free connection.