Camco RhinoEXTREME 20 ft Camper/RV Sewer Hose, 360 Clear Swivel Wye Fitting and Removable 4-in-1 Adapter (21056) Review (2026)

TPE hose construction

RhinoEXTREME hoses use thermoplastic elastomer, or TPE, material rather than the polyolefin found in Camco's standard RhinoFLEX line, and Camco states this construction resists pinholes, abrasion and crushing better than the standard hose, including holding its shape if accidentally stepped on rather than denting. The 20-foot hose weighs about 5.7 pounds and has been tested down to negative 40 degrees Fahrenheit, which matters for RVers who winter camp or store their rig somewhere the hose could freeze between trips. Camco manufactures the RhinoEXTREME line in the USA under a patented design, which is one reason this hose costs more than a comparable basic sewer hose kit.

The clear swivel wye fitting

This particular kit's defining feature is a translucent fitting with three swivel ends built to connect two separate holding tank valves at once, commonly gray and black tanks with independent outlets on the RV, rather than the single clear elbow found on simpler kits. Because the fitting is clear, a camper can also see when rinse water is running clean during the flush cycle, similar to a standard clear elbow, but the wye shape itself is the more important feature here for anyone whose RV routes gray and black water to separate valves instead of a single combined outlet at the bumper.

4-in-1 adapter and storage

A removable 4-in-1 adapter at the dump station end handles the range of common sewer inlet sizes found at campgrounds and dump stations, and removing it allows the hose to compress into a standard 4-inch square bumper storage tube on RVs equipped with one. Package dimensions run about 11.5 by 22.6 by 8.7 inches, which gives a sense of the space needed if storing the kit in a bin or basement bay rather than a built-in bumper tube, since the stiffer TPE material does not compress quite as flat as a thinner-walled hose might.

Tradeoffs versus standard RhinoFLEX

The tougher hose material and specialized wye fitting come at a real cost premium over Camco's standard RhinoFLEX kits, and the stiffer TPE walls are noticeably heavier and bulkier to coil or compress for storage than the thinner reinforced polyolefin hose used in the base line. For RVers whose only need is a basic clear elbow and single tank outlet, that added durability and dual-valve compatibility may be more capability than necessary. Camco backs the kit with a 12-month warranty from the date of purchase with a receipt, longer than the 90-day term on the standard RhinoFLEX kits, which reflects the more premium positioning of the RhinoEXTREME line.

Who this kit suits

This 21056 kit is best matched to RVs built with two separate holding tank valve outlets rather than a single combined connection, since the wye fitting is designed specifically around that plumbing layout, and to owners who camp in rough terrain or cold climates where the tougher TPE material and cold-weather rating pay off over a standard hose. Owners with a single-outlet RV and mild-climate camping habits may get equivalent day to day performance from a standard RhinoFLEX kit at a lower price, reserving the RhinoEXTREME line for situations where the added crush resistance or dual-valve fitting actually gets used regularly at the dump station rather than sitting as an unused upgrade in the storage bay.

Frequently asked questions