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Cosari
Cosari DuraFlow 24
Free tracked shipping to the US
- 24-mil TPE walls resist gravel pinholes and cold-weather
- 360° swivel bayonet fittings with gasket seals
- Clear 90° 4-in-1 elbow fits 3-inch to 4-inch
- Capped sections slide into standard 4-inch bumpers
- Free tracked shipping to the US · delivery times
- 30-day returns · refund policy
- Secure checkout · card, Apple Pay, Google Pay, Shop Pay, PayPal
- Questions? contact@cosarit.com · Mon–Fri 9–17 ET
Features

Step on It. It Comes Back.
TPE is an elastomer, so it flexes instead of cracking. Step on a coil, even on a cold morning, and it returns to round in about a second.

Quarter-Turn Lock, No Twisting
The swivel collar rotates independently of the hose. Twist it onto your RV outlet and the gasket seals while the hose stays where you laid it.

Watch It Run Clear
The clear elbow sits at the ground inlet. Flush until the water inside is clear, and you know the tank is clean.
Flexible Down to -20°F
TPE stays pliable on cold shoulder-season mornings, when stiffer plastic hoses are most likely to crease along the folds.
10 + 10 Foot Reach
Two interlocking sections mean you never wrestle 20 feet of slack for an 8-foot hookup.
Odor-Seal Caps
Twist-lock caps on all four ends keep odors and drips sealed inside, whether the hose lives in your bumper or a storage bay.
24-Mil TPE Armor
Walls twice as thick as standard vinyl, with raised wear ribs that keep the hose belly off sharp gravel. It recovers from a 320-lb crush and pops back to round.
Clear 4-in-1 Elbow
Threads into 3-inch slip and 3-inch, 3.5-inch, or 4-inch NPT sewer inlets. The clear body shows you exactly when the tank rinse runs clean.
4-Inch Bumper Fit
With a 3.9-inch maximum lug diameter, both capped sections slide into a standard 4x4 square steel bumper once the elbow is removed.
How to use it
- 1
Slide Out and Twist On
Pull a section out of your bumper, remove the cap, and quarter-turn the swivel bayonet onto your RV's waste valve. Add the second section if the inlet is more than 10 feet away.
- 2
Thread the Clear Elbow
Screw the 4-in-1 elbow into the campground sewer inlet, then lock the hose's bayonet end onto the top of the elbow.
- 3
Flush, Cap, and Store
Open the valve, dump black then grey, and watch the elbow until the rinse runs clear. Disconnect, cap all four ends, and slide it back into the bumper.
In the box
- 1 × 20-Ft Sewer Hose Set (2 × 10-Ft TPE Sections with Pre-Attached 360° Swivel Bayonet Fittings)
- 1 × Clear 90° 4-in-1 Dump-Station Elbow Adapter
- 1 × Set of 4 Twist-Lock Storage End Caps
Care & safety
- After each dump, rinse the hose with grey water or a dedicated rinse hose, then hold one end high to drain any remaining water before capping. Never use your drinking water hose to rinse it.
- Store the hose capped and out of direct sunlight when possible. Before freezing nights, drain it completely so no water is left to freeze inside the corrugations.
Specifications
- Length
- 20 ft total (2 × 10-ft sections)
- Compressed Length
- 39 in. per section
- Wall
- 24-mil abrasion-resistant TPE, 3 in. inner bore
- Fittings
- 360° swivel, 4-prong bayonet with gasket seal
- Elbow
- Clear 90° 4-in-1 (3 in. slip, 3 in., 3.5 in., 4 in. NPT)
- Operating Temperature
- -20°F to 150°F
- Maximum Lug Diameter
- 3.9 in.
- Kit Weight
- 6.8 lbs
Questions
Will the DuraFlow 24 fit inside my 4-inch square rear bumper?
In most cases, yes. The largest lug measures 3.9 inches across, and both capped sections slid into our 4x4 welded steel bumper once we removed the clear elbow. We recommend measuring the inside of your bumper first, because weld seams or rust can narrow the opening.
Is it one 20-foot hose or two sections?
Two 10-foot sections that connect together. Use one at close full-hookup sites, and add the second when the sewer inlet is farther away.
Will it sit in my hose support?
Yes. The 3-inch bore sits in standard accordion-style RV sewer hose supports.
How much is shipping?
Shipping to the US is free and tracked. You get a tracking number by email when your order ships. See the shipping policy for delivery times.
Can I return it?
Yes, within 30 days of delivery. Details are in our refund policy.
Who sells this product?
Cosari is run by Interactive Ecommerce LLC, Sheridan, Wyoming. Questions: contact@cosarit.com, Monday to Friday, 9:00–17:00 ET.
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