Stop the stink, the splash, and the mess. This soft foam sewer donut ring from Lippert slides over your standard 3-inch RV sewer hose and creates a snug, odor-blocking seal at the dump station inlet. Compact, lightweight, and reusable -- a small accessory that makes a big difference every time you dump.
Any RVer who has dumped their tanks at a campground or dump station knows the problem: even when your hose is seated well into the dump inlet, gaps around the opening let sewer gases and splashback escape. This soft foam sponge ring -- often called a sewer donut -- fills that gap.
The Lippert part number 2024121191 is a straightforward, reusable foam ring sized to work with standard 3-inch RV sewer hose fittings and typical dump station openings. Slide it onto the hose before inserting it into the dump inlet, and it compresses to form a seal that blocks odors from wafting back up around the connection point.
Soft foam compresses around the hose and dump inlet gap, reducing sewer gas blowback and ambient stink during the dump process.
Creates a barrier around the hose connection, minimizing sewage splashback at the dump station inlet -- especially important when tank pressure is high.
Soft foam construction holds up to repeated use. Rinse clean after each dump trip and store with your sewer hose kit.
At just 0.57 lbs and roughly 4.72" across, it tucks easily into any sewer hose storage tube or bay compartment without adding bulk.
Using a sewer sponge ring is straightforward:
This is an especially useful accessory for: