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  • Writer's pictureMr.U-Plumber

How to install the hot water tank correctly.

Updated: May 31

Installing a hot water heater yourself can be a challenging task, especially if you're not familiar with plumbing. It's generally recommended to hire a licensed plumber to ensure safe and proper installation.

However, if you're comfortable with DIY projects and in some localities permits are not required, here's a general overview of the steps involved:



Water Heater
Water Heater

Safety First

  • Turn off the gas supply valve and cold water shut-off valve connected to the water heater.

  • Open a hot water tap to relieve pressure and drain remaining water.

Disassemble the Old Unit (if applicable)

  • Attach a hose to the drain valve and drain the tank into a bucket or floor drain.

  • Disconnect water lines and electrical wires (for electric heaters) from the old unit.

  • Use wrenches to disconnect pipes and remove the old heater.


Prepare for the New Unit

  • Ensure the new heater is compatible with your existing space and venting system.

  • Place the new heater on a non-combustible stand (gas heater) or level floor (electric heater).

Plumbing Connections

  • Depending on your water line type (flex pipes, copper etc.) use appropriate connection methods like soldering, compression fittings etc following local plumbing codes.

  • Install pressure relief valve and temperature pressure (T&P) valve.


Electrical Connections (Electric Heater Only)

  • Following local codes, connect the heater to a dedicated circuit with the appropriate breaker size.

Filling and Checking

  • Slowly open the cold water shut-off valve to fill the tank.

  • Open a hot water tap to purge air from the system until water runs clear.

  • Check all connections for leaks and tighten if necessary.

Gas Line Connection (Gas Heater Only)

  • This step requires special skills and tools. It's highly recommended to hire a licensed gas fitter to ensure safe and proper connection.

Final Touches

  • Turn on the gas supply valve (gas heater) and light the pilot following the manufacturer's instructions (refer to the manual for specific steps).

  • Set the desired water temperature on the thermostat.

Safety Reminders

  • Gas leaks can be dangerous. If you smell gas, shut off the gas supply valve immediately and evacuate the area. Open windows and call a qualified professional.

  • Improper electrical connections can cause shock hazards. Ensure all electrical work adheres to local codes.

Additional Resources

  • Before attempting the installation, consult your user manual and local building codes for specific requirements.

  • For a more visual guide, consider searching for "[YouTube] How to Install Water Heater" for video instructions on heater installation (electric or gas).

Remember, this is a general guideline and professional help is always recommended, especially for gas heater installations.


You can look for available plumbers nearby in real-time.


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