Water & Sewer

How to Set Up an RV Sewer Connection the Right Way

Answers: What does a correct, odor-free RV sewer connection look like? · Updated August 2026

A sewer setup either works invisibly for years or becomes the reason your site smells. The difference is slope, support, and a sealed connection at the park inlet.

Quick answer

Use a supported hose that slopes continuously downhill to the park inlet, seal the connection with a threaded adapter or donut, keep the black valve closed until the tank is at least two-thirds full, and dump black before gray so the gray water rinses the hose.

Build the connection

1Set a hose support that gives a steady downhill run with no sagging low spots.
2Attach the hose to the RV outlet and lock the bayonet fittings.
3Seal at the park inlet with a threaded adapter or rubber donut so gases stay in the pipe.
4Check for leaks the first time you dump, then again monthly.

Dumping order and habits

Black tank first, gray tank second.
Dump black only when two-thirds full or more.
Use plenty of water — most tank problems are not-enough-water problems.
Wear disposable gloves and keep a dedicated hose for tank rinsing only.
Never rinse tank equipment at a potable water spigot.

Keeping it tidy for the long haul

Sun destroys sewer hoses. Store the spare out of direct light, replace a hose that has gone stiff or pinholed, and keep the run tucked so mowers and feet never find it.

Frequently asked questions

Why does my site smell like sewer?

Usually an unsealed park inlet connection, a dry P-trap, or a black tank that has been left open.

Do I need tank chemicals?

Water and habits matter more. Chemicals help with odor but cannot fix a tank starved of liquid.

Follow your manufacturer first. This guide is general information from a long-term RV park, not a substitute for the instructions that came with your RV, appliances, roof material, tires, or propane system. Those documents take priority. Use a qualified RV technician or licensed trade for propane, 120-volt electrical, refrigerant, structural, and suspension work.

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