Greywater and Freshwater Tank Maintenance
“Greywater & Freshwater Tank Maintenance — The Non-Toxic Way”
Have you ever looked at your greywater or freshwater tank and thought… what now?
If you’re new to vanlife, it’s one of those topics no one seems to talk much about—yet it’s so important. Whether you’re traveling full-time or part-time, knowing how to care for your water system helps avoid odors, mold, and unwanted buildup, while keeping your water safe and your van smelling fresh.
Here’s your go-to guide for simple, natural, and effective ways to care for your greywater and freshwater tanks.
💧 Fresh Water Tank Maintenance
Why it matters: This is the water you drink, cook with, brush your teeth with. Keeping it clean is essential for your health.
How often should I clean it?
If you’re not full-time: Clean it every 1-3 months or anytime the water smells or tastes off.
If you’re full-time: Clean it every 1-2 months or after filling up from questionable sources.
How to clean it (without harsh chemicals):
Drain the tank fully.
Use a natural cleaning mix: Combine 1 cup of white vinegar or baking soda with 1 gallon of warm water. Add it to your tank, let it sit for several hours or overnight, then flush thoroughly.
If you want a little extra boost, add a few drops of lemon essential oil—it helps with disinfecting and smells refreshing.
Pro tip: Always run your cleaning solution through the water lines, too. Turn on your faucets until the smell comes through, then let it sit.
🚿 Greywater Tank Maintenance
Why it matters: Left alone, greywater can build up soap scum, bacteria, and bad smells. Especially in hot weather!
How often should I clean it?
If you use it regularly, aim for once a month.
If you’re a weekend warrior or seasonal traveler, clean it after every trip or once per season.
How to clean it naturally:
Drain the tank completely at an appropriate dump station.
Mix 1/2 cup of baking soda and 1/2 cup of vinegar with hot water and pour it into your drain. Let it sit, then flush with more hot water.
You can also use enzyme-based tank treatments (like Happy Campers or Eco-Safe), which are biodegradable and safe for the environment.
🌿 Bonus Tips
Avoid antibacterial soaps or bleach in your system—they kill the good bacteria that help break down waste.
Add a mesh screen over your sink drain to reduce food particles going into the grey tank.
Flush tanks before long storage periods to prevent buildup or mold growth.
Keep a maintenance log so you remember when you last cleaned.
Keeping your van’s water systems clean doesn’t have to mean harsh chemicals or big chores. With a simple natural routine and regular attention, you’ll stay fresh, safe, and road-ready—whether you’re boondocking in the desert or parked at the coast.
Adventure On,
Amy and Marcy 💛
Helping women feel confident, capable, and empowered in vanlife.
