If your RV has been sitting all winter, getting your water system out of winter mode and fully into summer mode is one of the most important steps before your first trip.

Water systems sit idle for months, which can lead to loose fittings, trapped antifreeze, and small leaks that go unnoticed until you’re at the campground. Taking the time to go through this process properly helps you avoid those surprises.

Done right, this process is straightforward. Done wrong, it can lead to leaks, poor water quality, or issues that interrupt your trip.

Step 1: Start with Fresh Water & Sanitization

Begin by adding an approved RV sanitization product into your fresh water tank first, then fill the tank between half and full. This allows the solution to mix properly as the tank fills and ensures even distribution throughout the system.

• Add the approved RV sanitization solution first
• Fill the fresh water tank between half and full
• Allow the solution to mix naturally during filling
  

Step 2: Pressurize Using Your Water Pump

Turn on your onboard water pump and allow the system to build pressure. Once the pump shuts off, the system should be holding pressure properly.

This is your first opportunity to identify leaks before flushing everything through the system.

• Turn on the water pump
• Allow the system to reach full pressure
• Confirm the pump shuts off and holds pressure
• Inspect under sinks, around the toilet, near the water heater, and visible plumbing
  

Step 3: Flush Out Antifreeze
Next, begin flushing antifreeze from the system. This step ensures your water system is clean and safe for use.

• Run all faucets (hot and cold) until the water runs clear
• Flush the toilet thoroughly
• Run the shower and the handheld sprayer
• Run exterior shower or spray port if equipped
  

Special Note: Water Heater Bypass
If your RV is equipped with a traditional tank-style water heater, it is critical that the system remains in bypass mode during the initial flush.

• Leave water heater in bypass during initial flush
• After all lines run clear, return valves to summer mode
• Then proceed with final system pressurization
  
  

Step 4: Hook Up City Water & Re-Test

Once flushing is complete and valves are returned to summer mode, connect your RV to a city water source.

• Connect to city water
• Slowly pressurize system
• Inspect all plumbing areas again for leaks

Step 5: Don’t Forget the Underside

• Inspect holding tanks
• Check dump valves
• Check low point drains
• Look for any dripping or moisture
  
  

Step 6: Let It Sit Pressurized

• Leave system under pressure
• Monitor for any major leaks
• Perform final walkaround inspection
  

Get Ready for the Season with Confidence

• No surprises
• No leaks
• No issues when you get to camp