Draining the water lines in your home is an important maintenance task, whether you’re preparing for winter, making plumbing repairs, or leaving your house vacant for an extended period. By properly draining the pipes, you can prevent frozen pipes, water damage, and potential leaks.
This guide will walk you through the step-by-step process of draining your home’s water lines safely and efficiently.
When Should You Drain Your Water Lines?
Draining the plumbing system is necessary for several situations:
- Winterizing your home – If you’re leaving for the winter or have a seasonal home, draining the pipes prevents freezing and bursting.
- Plumbing repairs or renovations – Before working on pipes, faucets, or fixtures, it’s best to remove all water from the system.
- Vacant or foreclosed homes – If a property will be unoccupied for an extended period, draining the water lines can prevent damage.
- Water contamination issues – If you suspect contamination in your plumbing, flushing the system can help remove stagnant or contaminated water.
Step-by-Step Guide to Draining Your Water Lines
Step 1: Shut Off the Main Water Supply
Locate your home’s main water shut-off valve, typically found near the water meter or where the main line enters your home. Turn the valve clockwise to shut off the water supply completely.
💡 Tip: If you’re unsure where your shut-off valve is, check the basement, crawl space, or garage. If your home has a well, turn off the well pump as well.
Step 2: Open All Faucets and Fixtures
Starting at the highest point in your home (like an upstairs bathroom sink), turn on all the faucets, including:
- Bathroom and kitchen sinks
- Showers and bathtubs
- Laundry sinks
- Outdoor hose bibs
- Any other water-using fixtures
Then, move to the lowest level of the house and open those faucets to allow gravity to drain the water completely.
Step 3: Flush Toilets
Flush each toilet multiple times to empty the water from the tanks and bowls. If needed, use a sponge or towel to soak up any remaining water in the tank.
Step 4: Drain the Water Heater (If Necessary)
If you’re fully winterizing the home or doing repairs, you may also need to drain your water heater:
- Turn off the power to the water heater – Gas heaters should have the gas supply turned off, and electric heaters should be shut off at the breaker.
- Connect a hose to the drain valve at the bottom of the water heater and direct it outside or into a floor drain.
- Open the drain valve and allow the tank to empty completely.
💡 Tip: If you’re winterizing your home, also turn off and drain any water treatment systems, such as water softeners or filtration units.
Step 5: Blow Out the Lines (For Winterization)
For complete winterization, consider using an air compressor to blow out any remaining water in the pipes:
- Attach the compressor to an outdoor hose bib.
- Set the pressure to 40–50 PSI and slowly push air through the system.
- Keep faucets open until only air comes out.
This step is especially important in cold climates to prevent pipes from freezing and bursting.
Step 6: Close Faucets and Double-Check
Once all the water has drained, close all the faucets except one, which will remain open to release any residual pressure. If you drained your water heater, leave the drain valve closed until you’re ready to refill it.
How to Restore Water After Draining
When you’re ready to use your plumbing system again:
- Close all faucets and fixtures.
- Turn the main water supply back on slowly to prevent water hammer and pressure surges.
- Open a few faucets to allow air to escape and ensure water flows smoothly.
- If you drained the water heater, refill it before turning the power back on to avoid burning out the heating elements.
- Check for leaks or issues before using your plumbing normally.
Need Professional Help?
Draining water lines may seem simple, but if done incorrectly, it can lead to airlocks, pressure problems, or even plumbing damage. If you need help winterizing your home, performing plumbing repairs, or flushing your system, Plumb Smart, Inc. is here to help.
Contact master plumber Paul Little with questions, or schedule a professional plumbing service today! 🚰🔧