The Gear You Need
Most sewer hose failures happen at disconnection, not connection — usually because someone rushed the last step without gloves on a cold morning. I learned that the hard way at Thousand Trails Wilderness Lakes in Michigan, standing in the October drizzle pretending nothing happened. Get the right gear dialed in before you pull in, and the whole setup takes five minutes flat.
- Sewer hose: The hose your RV shipped with is fine for occasional use, but if you're logging serious full-hookup nights at KOA Resorts, state park sewer sites, or private campgrounds, upgrade to a Camco RhinoFlex or Valterra Dominator — both hold up to UV and hard storage far better. Have enough hose to reach the pedestal comfortably without stretching it tight; sites vary quite a bit, so extra length beats coming up short.
- Hose support (slinky): A plastic accordion support that keeps the hose sloped continuously downward from RV to pedestal. Without it, the hose sags and waste pools in the low spots — and stays there. Non-negotiable for multi-day stays.
- Bayonet (4-in-1) fitting: Connects the hose to the pedestal and accommodates different inlet sizes. Pedestal configurations vary by campground — older state parks especially — so the 4-in-1 covers more situations than a fixed fitting would.
- Elbow adapter: Attaches to your RV's sewer outlet on the coach side. The hose connects here on your end.
- Rubber gloves: Non-negotiable. No exceptions, no shortcuts.
- Disposable wipes or paper towels: For cleanup after disconnection. Keep a small zip-lock bag in your sewer kit — used wipes go in there, not on the ground.
Connection Steps
- Position the hose support from under the RV's drain outlet to the pedestal. The hose needs to run downhill the entire way — any sag creates a standing pool of waste that just sits there. At sites with elevation changes, like mountain campgrounds along the Blue Ridge Parkway corridor or in the Smokies, you may need to adjust the support mid-span.
- Connect the elbow adapter to the RV's drain outlet — bayonet or threaded, depending on your coach.
- Run the hose from the elbow adapter to the pedestal inlet. If the distance is more than your hose covers, use an extension rather than stretching a single hose tight — a taut hose pulls at both fittings and is more likely to pop loose mid-stay.
- Connect at the pedestal using the appropriate fitting. Push in and twist to lock on bayonet pedestals, or thread clockwise on threaded inlets. Give it a firm tug to confirm it's seated before you walk away.
- Verify the slope — hose should run continuously downhill from coach to pedestal. Adjust the slinky sections if anything looks level or angled the wrong way.
- Manage your valves correctly: On a multi-night full-hookup stay, keep the gray valve open for continuous drainage. Keep the black valve closed — open it only when you're ready to dump. This single habit separates clean setups from problem ones.
Disconnection Steps
- Close the gray valve if it's been running open
- Disconnect at the pedestal end first — this keeps any remaining hose contents from draining toward you
- Drain the hose: lift the pedestal end and walk it toward the RV, letting gravity pull residual liquid back down into the sewer inlet
- Disconnect from the RV elbow adapter
- Cap both hose ends — most hoses ship with end caps, use them every time
- Store the hose in a dedicated compartment, away from water hoses and anything else you'd rather not cross-contaminate
Common Mistakes
Leaving the black tank valve open continuously: This is the one that catches new RVers off guard. When you leave the black valve open at a full-hookup site, liquids drain away but solids build up — and without liquid to flush them, they dry into a dense mass at the bottom of the tank that's genuinely difficult to break up and remove. Campground hosts at places like Frontier Town in Maryland see this regularly. The fix is straightforward: keep the black valve closed and open it only to dump when the tank is around two-thirds to three-quarters full. That volume of liquid is what actually carries solids out of the tank during a dump.
No hose support: Without a slinky or hose support, the hose droops and waste pools in the low spots between connections. This causes backup problems over time and wears out the hose faster. On sites where the pedestal is set low or the ground is uneven — which is common at older state parks — this matters even more.
Skipping gloves: First-timers often skip this, especially on quick dump-and-go stops at campgrounds like Jellystone at Luray or Yogi Bear parks with convenient pull-through sites. Sewer fittings often drip at disconnection. Gloves take two seconds to put on and save you from a genuinely unpleasant moment every single time.
Related: Black tank dump guide · Dump station finder guide · RV campsite setup guide
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