How to drain your navien tankless water heater in 5 easy steps: a step-by-step tutorial

Maintaining your Navien tankless water heater is crucial for its longevity and optimal performance. Draining the water heater is a necessary part of this maintenance routine, and this comprehensive guide will provide you with step-by-step instructions on how to drain a Navien tankless water heater effectively.

Safety Precautions:

Before commencing the draining process, ensure your safety by following these precautions:

• Turn off the gas supply to the water heater.
• Close both the hot and cold water supply valves.
• Allow the water heater to cool down completely.

Step-by-Step Guide:

1. Locate the Drain Valve:

Navien tankless water heaters typically have a drain valve located at the bottom of the unit. Identify this valve and ensure it is easily accessible.

2. Attach a Drain Hose:

Connect a drain hose to the drain valve. The hose should be long enough to reach a drain or a bucket.

3. Open the Cold Water Supply Valve:

Partially open the cold water supply valve to allow fresh water to enter the water heater and displace the old water.

4. Partially Open the Drain Valve:

Slowly open the drain valve to allow the water to drain out. Do not open the valve fully, as this can create a vacuum and prevent the water from draining properly.

5. Monitor the Draining Process:

Keep an eye on the water flowing out of the drain hose. Once the water runs clear, the draining process is complete.

6. Close the Drain Valve:

Once the water has completely drained, close the drain valve tightly.

7. Reopen the Hot and Cold Water Supply Valves:

Reopen the hot and cold water supply valves to allow water to flow through the water heater again.

8. Vent the Air:

Open a hot water faucet to allow air to escape from the water heater. Close the faucet once water starts flowing without interruption.

Troubleshooting Tips:

If the Water Heater Does Not Drain:

• Check if the drain valve is fully open.
• Ensure the drain hose is not kinked or obstructed.
• If the water heater still does not drain, contact a qualified plumber.

If the Water Heater Drains Too Slowly:

• The drain hose may be too small. Use a larger hose for faster drainage.
• The drain valve may be clogged. Remove the valve and clean it thoroughly.

Benefits of Draining Your Navien Tankless Water Heater:

• Removes sediment and mineral buildup that can reduce efficiency and cause premature failure.
• Prevents freezing damage during winter months.
• Facilitates repairs and maintenance.
• Extends the lifespan of your water heater.

Maintenance Schedule:

To maintain optimal performance, drain your Navien tankless water heater annually or as recommended by the manufacturer.

Key Points:

Draining a Navien tankless water heater is a straightforward task that can significantly contribute to its longevity and efficiency. By following the steps outlined in this guide, you can effortlessly perform this essential maintenance procedure and enjoy the benefits of a well-maintained water heater.

Common Questions and Answers

Q: How often should I drain my Navien tankless water heater?
A: It is recommended to drain your water heater annually or as specified by the manufacturer.

Q: Is it necessary to hire a plumber to drain my water heater?
A: No, draining a Navien tankless water heater is a DIY-friendly task that can be completed with basic tools.

Q: What is the average lifespan of a Navien tankless water heater?
A: With proper maintenance, a Navien tankless water heater can last up to 20 years.

Q: What are the signs that my water heater needs to be drained?
A: Reduced water flow, noisy operation, and inconsistent water temperature can indicate the need for draining.

Q: Can I use a shop vacuum to drain my water heater?
A: No, using a shop vacuum to drain a water heater is not recommended as it can damage the vacuum and the water heater.