A simple, reliable seal that plugs the gap between your 3-inch sewer hose and a 4-inch dump station inlet. The Camco 39313 eliminates sewer gas odors at the connection point and works equally well as a standalone dump-station seal or paired with Camco's grey water seal adapter. A low-cost upgrade that every RVer who dumps regularly should keep in their bay.
When your sewer hose meets the dump station inlet, there is often a size mismatch -- most RV sewer hoses are 3 inches in diameter, while many dump station openings are 4 inches wide. That gap lets sewer gas escape freely, which is unpleasant for you and for anyone nearby at the campground. The Camco 39313 bridges that gap with a snug, odor-blocking seal.
Made of flexible black rubber compound, the seal compresses around the hose and against the dump station collar, forming an airtight and liquid-tight fit. It is designed to work with Camco's grey water seal fittings and is also compatible when used directly over a bare sewer hose for standard hookups.
Flexible rubber construction seals the annular gap between a 3-inch sewer hose and a 4-inch dump station opening, blocking sewer gas from escaping.
Designed to work in conjunction with Camco grey water seal fittings as well as directly over standard 3-inch bayonet-style sewer hoses.
No tools needed. Slide the seal over the hose end, insert into the dump station inlet, and the taper locks it in place under slight hand pressure.
One seal per package. Compact enough to store in your sewer kit bag, hitch storage, or basement bay alongside your hose and fittings.
The hose seal functions as a tapered rubber grommet. The 4-inch outer diameter seats against the dump station inlet collar, while the 3-inch inner bore accepts the sewer hose. As you press the assembly downward, the rubber deforms slightly to fill any irregularities in the opening, creating a seal even on worn or slightly off-round dump station openings commonly found at older campgrounds and dump stations.
If you run a separate grey water drain hose during extended stays, the 39313 seal is designed to mate with Camco's grey water seal adapter so both connections stay odor-free simultaneously.
Many campgrounds and dump stations now require sealed connections to prevent spills and odors at the dump inlet. Carrying a hose seal is a simple way to comply with these requirements and stay on good terms with camp hosts.