New to RVing? Learn the step-by-step process for safely and cleanly emptying your black and gray water tanks at any RV dump station — plus the equipment you need and etiquette tips to get it right the first time.
Using an RV dump station for the first time is one of those milestones that every new RVer dreads, then quickly realizes is no big deal. Once you've done it once or twice, the whole process takes under ten minutes. This guide walks you through every step — from what to pack in your sewer kit before you leave home, to how to leave the pad cleaner than you found it.
Equipment You Need Before You Arrive
Don't pull into a dump station underprepared. The right gear makes the process clean, fast, and stress-free:
- Sewer hose: At least 20 feet of flexible, ribbed hose rated for sewage. Cheap hoses crack — invest in a quality brand like Camco RhinoFLEX or Valterra Dominator.
- Hose caps: Both ends need sealed caps during transport. One cracked cap in your compartment creates a smell you'll never forget.
- Rubber gloves: Heavy-duty nitrile gloves that extend past the wrist. Non-negotiable — every single time.
- Donut gasket: A rubber ring placed around the dump inlet prevents blowback from gas pressure during draining. A $5 donut prevents an extremely unpleasant situation.
- Adapter fittings: Stations across the country use different inlet sizes. A 3-in-1 or 4-in-1 adapter set means you're never stuck with an incompatible connection.
- Dedicated rinse hose: A garden hose clearly marked "SEWER ONLY." Never mix this with your fresh water hose.
- Holding tank treatment: You'll add this after dumping to prime the tank for your next use.
Step-by-Step: How to Dump Your RV Tanks
Step 1 — Position your rig. Pull up so your sewer outlet (the cap under the coach on the driver's side) is directly over or as close as possible to the dump station inlet. Set the parking brake and turn off the engine. You'll need to be able to walk around freely.
Step 2 — Glove up. Put your gloves on before you touch anything. This isn't optional and it isn't dramatic — it's just the right call every time.
Step 3 — Connect the sewer hose. Attach one end firmly to your RV's sewer outlet using the bayonet-style twist connection. Feed the other end into the dump station inlet and seat the donut gasket around it so it won't pop out during draining. If the hose needs to travel uphill to reach the inlet, use a hose support ramp to create a gravity-friendly slope.
Step 4 — Open the black tank valve first. The black tank holds toilet waste and should always go first. Open the valve and let it drain fully — typically two to four minutes depending on tank size. You'll hear the flow taper off when it's done. If your RV has a clear elbow fitting, you can watch the flow directly.
Step 5 — Open the gray tank valve. Once the black tank is empty, close its valve and open the gray tank (sinks and shower). Gray water is soapy and helps rinse the residue from your sewer hose as it drains. Let it run completely empty.
Step 6 — Flush the black tank. If your RV has a black tank flush port (a separate inlet near the sewer outlet), connect your dedicated rinse hose to it and run water for three to five minutes while the black tank valve is open. This prevents the dreaded "pyramid plug" — a solid waste buildup that can block the entire tank — and keeps your level sensors accurate.
Step 7 — Disconnect and stow. Close all valves. Disconnect the hose from the dump station inlet first, then from your RV. Cap both ends immediately. Rinse the outside of the hose with your dedicated water hose before stowing it in its compartment.
Step 8 — Rinse the pad. Use the station's fresh water hose to rinse the concrete pad, the inlet cover, and any area that may have been splashed. Leave the station cleaner than you found it. This is the single most important thing you can do to keep free dump stations available to everyone.
Step 9 — Add tank treatment. Pour a measured dose of holding tank treatment down your toilet and add a gallon of water. This primes the tank, breaks down future waste, and controls odor until your next dump.
Common Beginner Mistakes to Avoid
- Opening the gray tank before the black tank — the gray water rinse needs to go last, not first
- Walking away while tanks drain — hoses can slip and blowouts are your responsibility
- Using the station's rinse hose to fill your fresh water tank — serious health risk
- Forgetting to close the black tank valve before opening the gray tank valve
- Leaving without rinsing the pad — this is how stations get shut down
That's the whole process. With a bit of practice you'll have it down to a smooth seven-minute routine. The anxiety disappears after the first successful dump — and the freedom of the open road becomes a lot more appealing when you know you can handle what comes with it.
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