Your fresh water tank holds your drinking, cooking, and showering water—so it needs to stay clean and safe. Learning how to sanitize and maintain your RV fresh water tank protects your health and keeps your plumbing system in great condition.
Sanitize at Least Every 6 Months
To sanitize your system:
- Drain the tank and close the drain valve
- Mix 1/4 cup of bleach per 15 gallons of tank capacity
- Fill the tank with the bleach-water mix
- Run water through all faucets until you smell bleach
- Let it sit for 4–12 hours, then flush with clean water until the bleach smell is gone
If you prefer a hands-off approach, Daisy RV offers full sanitizing services.
Clean Filters and Connections
Inspect and clean:
- Water pump filters
- Hose screens and inlet filters
- Exterior fill connections
Use a soft brush and vinegar or RV-safe cleaner to remove buildup and debris.
Use Only Drinking Water Hoses and Filters
Never use a regular garden hose. Use:
- White or blue drinking-water-safe hoses
- Inline water filters to catch sediment and chlorine
- Pressure regulators to prevent overpressurization
These accessories extend the life of your plumbing system and improve water taste.
Knowing how to sanitize and maintain your RV fresh water tank ensures clean, safe water wherever you travel.
