The first step is to drain the freshwater tank of any remaining water. Most RVs have a low-point drain at the bottom of the tank that allows this. Once the tank is empty, close the drain. Then, following the instructions on the Cleaning bottle, add 1 ounce of the concentrated solution to the freshwater tank for every 4 gallons of tank capacity. As an example, a typical 40-gallon water tank uses 10 ounces of the solution.
RV Water Flush
Thetford’s two-part Fresh Water Tank Sanitizer system takes the guesswork out of deodorizing and sanitizing the freshwater system. It’s inexpensive (two 24-ounce bottles sell for less than $15), fast and effective.


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