Camco RhinoEXTREME 20 ft RV Sewer Hose Kit, Pre-Assembled, 4-in-1 Dump Station Adapter, Crush and Abrasion Resistant (21012) Review (2026)

Pre-assembled, ready to use

Unlike Camco's standard RhinoFLEX kits that ship with fittings the owner threads together, this RhinoEXTREME 21012 kit arrives pre-assembled with the bayonet and lug fittings, transparent elbow and 4-in-1 dump station adapter already attached to the two 10-foot hose sections. That means less setup time before a first trip, since there is no risk of a loose connection at a threaded joint the owner forgot to tighten. The tradeoff is that if one fitting on a pre-assembled section ever fails, replacing just that piece is less straightforward than it would be on a kit designed around separate, owner-attached components.

TPE construction and durability

Like the rest of the RhinoEXTREME line, this hose uses TPE, or thermoplastic elastomer, material that Camco states offers protection against pinholes along with superior abrasion resistance and crush protection compared with standard polyolefin hose. Camco says the hose will not dent or rust and resists crushing if accidentally stepped on, a real concern at cramped dump stations where hoses often cross walking paths between the RV and the sewer inlet. The kits in this product line are manufactured in the USA, which Camco positions as part of the premium materials and construction behind the RhinoEXTREME name.

4-in-1 adapter and storage caps

The transparent elbow includes a 4-in-1 dump station fitting sized for the common range of sewer inlet types found at campgrounds, from 3 inch slip fittings to larger threaded pipe connections, so the kit should connect at most standard dump stations without needing separate adapters purchased later. Four storage caps are included to seal both ends of each hose section after use, keeping residual moisture and odor contained while the hose rides in a storage bay or bumper tube between stops on a multi-stop trip. Sealing both ends also keeps grit and insects out of the hose interior while it sits unused between campground stays, which matters over a season of intermittent use.

Compressed length and storage

Each 10-foot hose section compresses to roughly 57 inches with its fittings attached, and the 4-in-1 adapter is removable so the hose assemblies can fit into a standard 4-inch square bumper storage tube common on many towable RVs. That compressed length is longer than some RhinoFLEX sections, reflecting the heavier duty TPE wall thickness, so RVers with a tight built-in bumper tube should check available space before assuming this kit will fit as compactly as a lighter duty hose would in the same tube. Owners without a built-in bumper tube will need a separate storage container, bag, or exterior mounted tube to keep the assembled hose contained between trips.

How this compares to the standard 21056 kit

This 21012 kit uses a standard transparent elbow rather than the three-way swivel wye fitting found on Camco's 21056 kit, making it the better match for RVs with a single combined sewer outlet rather than separate gray and black tank valves. Both kits share the same TPE hose material and crush resistance, so the choice between them mostly comes down to whether an RV's plumbing needs the dual-valve wye connection or not, along with a modest price difference between the pre-assembled elbow version and the wye-equipped alternative. Buyers unsure which their RV needs can check whether their gray and black tanks share one bumper outlet or drain through two separate valves before ordering either kit.

Frequently asked questions