Understanding how to execute a tankless water heater install properly can significantly impact your home’s energy efficiency, performance, and ultimately, its energy savings. This task, while appearing daunting to some, can enhance the overall functionality of your household, providing endless hot water on demand, and possibly extending the equipment’s lifespan. Equipping yourself with knowledge on the correct installation procedures ensures that whether you opt for a gas tankless water heater or an electric tankless water heater, you maximize its potential benefits while adhering to safety standards.
This step-by-step guide will cover everything from gathering the necessary tools and materials, preparing the installation site, through the mounting and making necessary electrical connections or gas line connections, to the inspection and first run of your new tankless water heater. By understanding the specifics of tankless water heater installation, including considerations for water pressure, fuel type, and maintenance requirements, homeowners can ensure they are making an informed decision that aligns with their household needs and capabilities. In addition to providing a roadmap for a successful installation, this guide also aims to answer common questions about how to install a tankless water heater, with an emphasis on achieving longer lifespan and optimal performance.
Gathering Tools and Materials
List of Required Tools
Before beginning the tankless water heater installation, it is crucial to gather all necessary tools. This includes adjustable wrenches, pipe wrenches, a drill/driver, and a keyhole saw. If replacing an existing water heater, a hand truck will be needed to assist with removal. Additionally, tools such as manometers for checking gas pressure, gas pressure regulators, and a variety of screwdrivers should be prepared. For those working with gas lines, ensure to have gas vent pipes, elbows, caps, and an approved pipe joint compound to secure connections and prevent leaks.
Purchasing Necessary Supplies
When it comes to materials, the specifics depend largely on whether the installation is for a gas tankless water heater or an electric tankless water heater. Common supplies include copper tubing, ball valves, water heater connectors, and PVC pipes and glue for any necessary venting arrangements. It is also important to purchase leak detectors and condensate pumps to ensure the system functions safely and efficiently. Make sure to use materials as specified in the product manual to comply with safety standards and warranty requirements. For gas installations, items like gas lines, shut-off valves, and sediment traps are essential. Always check that the gas type and supply pressure are appropriate for the model being installed.
Preparing the Installation Site
Shutting off Utilities
Before starting the installation of a tankless water heater, it is essential to ensure all utilities are safely disconnected. First, turn off the electrical supply by switching off the circuit breaker or pulling the fuses associated with the old water heater. Use a voltage tester to confirm that all power sources are disconnected. For gas water heaters, locate the gas shut-off valve and turn it clockwise to stop the gas flow. This prevents any gas leakage during the installation process. Additionally, turn off the water supply to avoid any potential flooding. Run water from a nearby faucet until it turns cold; this indicates that the water in the system has stopped circulating.
Removing Old Water Heater
Once all utilities are shut off, connect a garden hose to the drain valve of the old water heater to empty any remaining water. If the water heater is located in a basement, consider using a portable pump to aid in draining. Open the temperature and pressure relief valve to expedite draining. After draining, disconnect the water pipes and electrical connections. Carefully remove the old water heater, ensuring not to damage any existing wiring or plumbing. This step may require assistance or a hand truck, especially if the old unit is large or cumbersome.
Mounting and Connecting the Tankless Heater
Wall Mounting Instructions
First, locate a suitable position for the tankless water heater. It should be mounted on an interior wall that supports the weight and has access to water and gas lines, if applicable. Use a stud finder to ensure the mounting screws will go into studs. Mark the positions, and drill pilot holes. Lift the heater into place, align it with the holes, and secure it with the appropriate mounting hardware.
Connecting Water and Gas Lines
Once the heater is mounted, connect the water lines. Start by applying plumber’s tape to the threads of the water connections to ensure a tight seal. Attach the hot and cold water lines, ensuring they are tightened securely. For a gas tankless water heater, connect the gas line next. Use a flexible gas hose for easier installation and apply gas-rated thread tape to prevent leaks. Test all connections by turning on the water and gas briefly to check for any signs of leakage.
Electrical Connections
For electric tankless water heaters, ensure the power is off before starting any electrical work. Connect the heater to the electrical supply according to the manufacturer’s instructions. This typically involves connecting the wires to the corresponding terminals inside the unit and securing them. Once connected, cover the terminal box and ensure all connections are enclosed safely. Before activating the unit, double-check that all electrical connections comply with local codes and regulations.
Inspection and First Run
Before activating the tankless water heater, it is crucial to conduct a thorough inspection to ensure everything is properly set up. This involves several checks and adjustments to guarantee the system operates efficiently and safely.
Final System Checks
- Power Source and Connections: Confirm that the power source, whether electricity, gas, or propane, is turned off. This is a safety measure to prevent any accidents during the inspection process.
- Valve Configurations: Check that all valves near the heater are closed to stop water from entering or leaving the heater during the inspection. This step is critical to avoid water damage or leaks.
- Purge Valves: Locate the purge valves, typically marked with a T-shaped handle, and release any pressure buildup by lifting the handle. This helps in preventing any pressure-related issues once the system starts operating.
- Hose Attachments: Ensure that the hoses are securely connected for flushing the system. This setup is necessary to clear out any debris or buildup within the heater.
- System Flushing: Follow the manufacturer’s instructions to attach hosing to the appropriate ports and set up for flushing. Use a solution like vinegar to run through the system, which helps in removing scale and sediment buildup. Allow the solution to circulate for at least one hour to ensure thorough cleaning.
Running the Heater for the First Time
- Reconnecting Power: Once the inspection and flushing are complete, carefully reconnect the power source. For gas heaters, this includes ensuring all gas connections are secure and leak-free.
- Opening Valves: Turn the valves to their operational positions, usually perpendicular to the valve body, allowing water to flow through the system.
- Initial Water Flow: Open a faucet to allow air to escape from the pipes. This process might cause sputtering as the air is expelled, but soon, water should flow smoothly.
- Heater Activation: Follow the specific start-up procedures outlined in the heater’s manual. This often involves turning on the heater and adjusting settings according to your hot water needs.
- Leak Checks: After the heater is running, inspect all connections for leaks. This is crucial to ensure there are no water or gas leaks that could pose safety risks.
By meticulously following these steps, homeowners can confidently initiate the first run of their tankless water heater, ensuring it operates efficiently and safely from the start.
Conclusion
Through this guide, we’ve walked step by step from preparing the installation site to the initial run of your tankless water heater, covering crucial considerations for both gas and electric models. This approach not only simplifies the seemingly complex process but also empowers homeowners to either take on the project themselves with confidence or understand the process well enough to oversee professional installation. By highlighting key steps like selecting the right tools, making connections correctly, and ensuring the system is thoroughly checked before use, we’ve laid down a foundation for installing a tankless water heater that promises efficiency, safety, and longevity.
Remember, the success of installing a tankless water heater lies in meticulous preparation, correct execution, and regular maintenance. While this guide aims to demystify the installation process, some homeowners might prefer professional assistance to guarantee the precision and safety of the install. If you find yourself in need of expert support, do not hesitate to call the pros at Just Plumbing, who specialize in water heaters among other services. Ultimately, whether you choose to DIY or hire a professional, understanding this process ensures your home enjoys an endless supply of hot water efficiently and safely for years to come.
FAQs
- Is it feasible for me to install a tankless water heater by myself?
While it is possible to install a tankless water heater on your own, it is advisable only if you have substantial experience with gas lines, water lines, and electrical systems. Improper installation can lead to severe damage. - What should I consider before installing a tankless water heater?
Before installing a tankless water heater, consider the following:
- Size Appropriately: Ensure the unit is correctly sized, which your plumber can help determine.
- Gas Supply: Verify that your gas supply is adequate.
- Air Requirements: Ensure there is enough air for the unit to operate efficiently.
- Temperature Settings: Avoid setting the temperature too high.
- Water Quality: Plan for ongoing water quality maintenance.
- Condensation Management: Prepare to handle any condensation issues.
- Are there locations where a tankless water heater should not be installed?
Avoid installing a tankless water heater in areas with high humidity, excessive dust, or where it might be exposed to water splashes and other liquids.
4. How long does it typically take to install a tankless water heater?
The installation of a tankless water heater generally takes between 6 to 10 hours for a team of two technicians, depending on the specific installation requirements.