---
title: Why is it stinky in my RV even after I dump black/grey tanks?
description: Have you flushed the black tank recently? Added chemicals to black and grey tanks? Do you leave the valves closed in between dumping sessions? You could have a AAV (Air Admittance Valve) gone bad and needs replaced, see other docs…
url: "https://teci-rv.com/docs/why-is-it-stinky-in-my-rv-even-after-i-dump-black-grey-tanks/"
updated: "2024-07-06"
category: Water Systems
---

# Why is it stinky in my RV even after I dump black/grey tanks?

Have you flushed the black tank recently?

Added chemicals to black and grey tanks?

Do you leave the valves closed in between dumping sessions?

You could have a AAV (Air Admittance Valve) gone bad and needs replaced, see other docs here about AAV, the explanation and how to replace it(coming soon)