Dump Station

A dump station is a purpose-built facility for draining an RV’s holding tanks (black water and grey water). It consists of a 3” or 4” sewer pipe at ground level, threaded for the standard RV sewer hose connection, with a hinged cover and a non-potable rinse water spigot nearby.

Dump stations are the infrastructure that makes boondocking and partial-hookup camping practical. You fill your fresh water tank at the start of your trip, use your onboard tanks for several days, then dump at a dump station before refilling.

Where to find dump stations

• Most campgrounds with hookups have a dump station at the exit, free for registered campers.
• Highway rest areas in some states (notably Idaho, Montana, the Dakotas, and most Western states) have dump stations. Free.
• Truck stops (Pilot, Love’s, Flying J) frequently have dump stations at locations along major routes. Usually $5–$15.
• State parks typically have a free dump station for campers.
• Some Walmart and Cracker Barrel locations have arrangements with RVers but rarely a dedicated dump.
• City and county dump stations in some areas, often free.

The app most rental renters use to find dump stations is Sanidumps or AllStays. Both have crowd-sourced location data and reviews.

The dumping sequence

1. Pull up to the dump station. Get the curb-side of the RV (where your sewer drain is) lined up with the dump station pipe.
2. Put on disposable gloves. Reputable rental companies include a box in the kitchen kit.
3. Remove the sewer cap from your RV’s drain. Connect your sewer hose to the drain, secure the bayonet lugs.
4. Place the hose end into the dump station pipe. Many dump stations have a hose end “donut” weight that helps keep the hose seated. If yours doesn’t, hold it in place with a foot until the gate valves open.
5. Open the black tank valve first. Drain completely (typically 1–2 minutes).
6. Close the black valve.
7. Open the grey valve. Let the grey water flush through the hose to clean it.
8. Close the grey valve.
9. Use the rinse spigot to flush the inside of the sewer hose. Most dump stations have a non-potable water hose specifically for this — never use a fresh water hose at a dump station.
10. Stow your sewer hose in the bumper-bar storage tube (or wherever the rental company keeps it).
11. Add fresh water and tank treatment to the black tank.
12. Cap the RV drain. Pull away.

Whole process: 7–10 minutes once you’ve done it twice.

Macerator pumps — what they are

Some larger Class A rigs have a macerator pump instead of a gravity-fed dump valve. The macerator grinds solids and pumps the waste through a smaller hose (usually 1” or so), which lets you connect to a sewer cleanout that’s some distance from the rig.

Macerator-equipped rigs change the procedure: you connect the small hose, run the pump, and the waste pressurizes out. No gravity needed. Most rental Class A rigs don’t have them, but if yours does, the operator will demonstrate it at pickup. Don’t operate one without the walkthrough — the failure mode (clogged macerator that backs up) is unpleasant.

What’s gross and what isn’t

The dump station looks worse than it is. With gloves and a sewer hose, your hands never touch waste. The hose stays sealed at both ends from the time waste leaves the tank to the time it enters the dump pipe. Spills are rare and easy to avoid with basic attention.

Once you’ve dumped twice, the whole process feels routine.