It is best to hire a professional plumber to install an on-demand water heater, as it requires specialized knowledge and experience. However, if you are confident in your DIY abilities and have some plumbing experience, you can attempt the installation yourself. Before you begin, make sure you have all the necessary tools and materials, and that you have read and understood all the manufacturer’s instructions. First, you will need to shut off the water supply to your home and drain the existing water heater. Next, you will need to remove the old water heater and connect the new one to the water supply and gas line. Finally, you will need to turn on the water supply and gas, and check for leaks.
On-demand water heaters are a great way to save energy and money, and they can also provide you with an endless supply of hot water. If you are considering installing an on-demand water heater in your home, be sure to do your research and choose a model that is right for your needs. With a little planning and effort, you can have a new on-demand water heater up and running in no time.
Once you have installed your on-demand water heater, you will need to maintain it regularly to ensure that it continues to operate efficiently. This includes flushing the sediment from the tank once a year, and checking the anode rod for corrosion. You should also have your on-demand water heater inspected by a qualified plumber every few years to ensure that it is operating safely and efficiently.
Choosing the Right On-Demand Water Heater
Selecting the ideal on-demand water heater for your needs involves carefully considering several key factors:
Fuel Type and Availability
On-demand water heaters operate on different fuel sources such as propane, natural gas, or electricity. Choose a fuel that is readily accessible and cost-effective in your area. Consider the gas line or electrical wiring requirements and ensure that your home has the necessary infrastructure to support the chosen fuel type.
Flow Rate and Sizing
The flow rate determines how much hot water your heater can deliver per minute. It is important to select a heater with a flow rate that meets your household’s demand, especially during peak usage times. Refer to the table below for a guideline on choosing the appropriate flow rate based on the number of fixtures in your home.
| Number of Fixtures | Flow Rate (GPM) |
|---|---|
| 1-2 | 2-3 |
| 3-4 | 4-6 |
| 5-6 | 6-9 |
| 7-8 | 9-12 |
| 9+ | 12+ |
Efficiency and Energy Consumption
Energy efficiency is crucial to reduce operating costs. Look for heaters with a high Energy Factor (EF) or Annual Fuel Utilization Efficiency (AFUE) rating. A higher EF or AFUE indicates greater efficiency and lower energy consumption.
Installing the Water Supply Lines
Once the on-demand water heater is in place, you need to connect the water supply lines. This involves connecting the cold water line to the inlet valve on the water heater and the hot water line to the outlet valve on the water heater.
Preparing the Water Lines
Before connecting the water lines, you need to prepare them by cutting them to the appropriate length and adding a shut-off valve to the cold water line. The shut-off valve will allow you to turn off the water supply to the water heater for maintenance or repairs.
Connecting the Cold Water Line
To connect the cold water line, follow these steps:
- Attach the water line to the inlet valve. Use a pipe wrench to tighten the connection.
- Turn on the water supply. Check for leaks at the connection.
- Tighten the connection further if necessary.
Connecting the Hot Water Line
To connect the hot water line, follow these steps:
- Attach the water line to the outlet valve. Use a pipe wrench to tighten the connection.
- Turn on the water supply. Check for leaks at the connection.
- Tighten the connection further if necessary.
Connecting the Gas Line
Before connecting the gas line to the water heater, ensure that you have turned off the gas supply. Once the gas supply is off, follow these steps:
- Locate the gas inlet on the water heater. It is typically a 1/2-inch or 3/4-inch male pipe thread connection.
- Measure and cut the gas line to the appropriate length to reach the gas inlet.
- Apply pipe dope to the threads of the gas line and screw it onto the gas inlet. Tighten the connection using a pipe wrench.
- Install a flexible gas connector between the gas line and the shutoff valve. This will allow for some movement of the water heater without putting stress on the gas line.
- Turn on the gas supply and check for leaks. To check for leaks, use a soap solution and apply it to all gas fittings. If there are any leaks, you will see bubbles form. If you find any leaks, tighten the fittings until they stop leaking.
| Pipe/fitting | Tightening torque |
|---|---|
| Gas Inlet | 20-25 ft-lbs |
| Gas Outlet | 15-20 ft-lbs |
Note: If you are not comfortable connecting the gas line yourself, it is always best to hire a qualified plumber to do the work for you.
Troubleshooting Common Problems
No Hot Water
- Check the power supply: Ensure the water heater is plugged into a functioning outlet and that the circuit breaker or fuse has not tripped.
- Verify the gas connection: If your water heater is gas-powered, make sure the gas supply is turned on and that the gas line is not kinked or obstructed.
- Clear any blockages: Remove any debris or sediment that may have accumulated in the inlet or outlet pipes.
- Reset the water heater: Turn off the power or gas supply to the water heater, wait a few minutes, and then turn it back on.
Water Leaking from the Tank
- Check the anode rod: Replace the anode rod if it is corroded or damaged.
- Inspect the drain valve: Tighten or replace the drain valve if it is loose or leaking.
- Examine the tank: If the tank has a hole or crack, it will need to be replaced.
- Call a plumber: If the source of the leak cannot be identified or repaired easily, contact a qualified plumber.
Inconsistent Water Temperature
- Adjust the temperature setting: Increase the temperature setting on the water heater.
- Check the mixing valve: If your water heater is connected to a mixing valve, adjust the valve to allow more hot water to flow.
- Insulate the pipes: Wrapping the hot water pipes with insulation can help reduce heat loss and maintain a consistent temperature.
- Flush the tank: Sediment that accumulates in the tank can cause temperature fluctuations. Flush the tank according to the manufacturer’s instructions.
Insufficient Hot Water Capacity
- Increase the water heater size: Choose a water heater with a larger capacity to meet your household’s demand for hot water.
- Reduce water usage: Encourage family members to shorten showers, avoid running faucets unnecessarily, and use low-flow appliances.
- Install a demand circulator: A demand circulator keeps hot water circulating through the pipes, eliminating the wait for hot water at the faucet.
- Consider a hybrid or solar water heater: These systems supplement the conventional water heater and can provide additional hot water capacity.
Maintaining Your On-Demand Water Heater
Regular maintenance is crucial to ensure optimal performance and longevity of your on-demand water heater. Follow these steps:
1. De-lime Your Heater:
Mineral buildup (scale) can reduce efficiency. De-lime your heater annually using a commercial descaling solution or vinegar.
2. Clean the Sediment Filter:
Sediment can clog the filter, restricting water flow. Clean or replace the filter every six months.
3. Check the Expansion Tank:
The expansion tank absorbs pressure fluctuations. Inspect it yearly to ensure it’s in good condition and has proper water pressure.
4. Monitor Water Temperature:
The optimal temperature for most water heaters is 120-140°F. Check the water temperature periodically to adjust as needed.
5. Flush Your Heater:
Flushing removes sediment and debris. Flush your heater every six months by opening the drain valve for a few minutes.
6. Inspect the Igniter:
The igniter sparks the gas to heat the water. Inspect it annually and replace if necessary.
7. Test the Thermostats:
Thermostats control the water temperature. Test them periodically to ensure they’re functioning properly.
8. Maintain Gas Pressure:
Gas-powered heaters require a consistent gas supply. Check the gas pressure if you notice a drop in water temperature.
9. Check the Gasket:
The gasket between the tank and heat exchanger can deteriorate over time. Inspect it annually and replace if necessary.
10. Annual Professional Inspection:
Schedule an annual inspection with a qualified plumber to thoroughly inspect your water heater and address any potential issues.
| Maintenance Task | Frequency |
|---|---|
| De-lime | Annually |
| Clean Sediment Filter | Every 6 months |
| Check Expansion Tank | Annually |
| Monitor Water Temperature | Periodically |
| Flush Heater | Every 6 months |
| Inspect Igniter | Annually |
| Test Thermostats | Periodically |
| Maintain Gas Pressure | As needed |
| Check Gasket | Annually |
| Professional Inspection | Annually |
How To Install An On Demand Water Heater
Installing an on demand water heater can be a great way to save energy and money. On demand water heaters heat water only when you need it, so you don’t have to pay to keep a tank of water heated all the time. They’re also more efficient than traditional water heaters, so you can save even more money on your energy bills.
If you’re thinking about installing an on demand water heater, there are a few things you need to do before you get started.
- First, you need to check your home’s water pressure. On demand water heaters require a minimum water pressure of 20 psi to operate properly. If your water pressure is too low, you may need to install a booster pump.
- Next, you need to choose the right size water heater for your home. The size of the water heater you need will depend on the number of people in your household and the amount of hot water you use.
- Finally, you need to decide where you want to install the water heater. On demand water heaters can be installed indoors or outdoors. If you’re installing the water heater outdoors, you’ll need to make sure it’s in a location where it will be protected from the elements.
People Also Ask
How much does it cost to install an on demand water heater?
The cost of installing an on demand water heater will vary depending on the size of the water heater, the location of the installation, and the complexity of the installation. However, you can expect to pay between $1,000 and $2,500 for the installation of an on demand water heater.
How long does it take to install an on demand water heater?
The installation of an on demand water heater typically takes between 4 and 8 hours.
What are the benefits of installing an on demand water heater?
There are several benefits to installing an on demand water heater, including:
- Energy savings – On demand water heaters only heat water when you need it, so you don’t have to pay to keep a tank of water heated all the time.
- Efficiency – On demand water heaters are more efficient than traditional water heaters, so you can save even more money on your energy bills.
- Endless hot water – On demand water heaters provide an endless supply of hot water, so you’ll never run out of hot water again.
- Compact size – On demand water heaters are much smaller than traditional water heaters, so they can be installed in tight spaces.
