A tankless water heater is a great addition to any home. They are much more efficient than conventional water heaters and can save up to 80% on your water heating bills. Unfortunately, they aren’t immune to problems; just like any appliance, they can break down and need to be repaired. If your tankless water heater is leaking water, you’ll need to locate the source of the problem and repair it before it causes further damage.Fortunately, there is almost always one thing you can do to fix a leaking tankless water heater: Shutoff the water main and open the cold water tap at the same time.

Step 1: Shut off the water supply

When you turn off your water supply, you’re shutting off the water main. If your water main is located underground, the shut-off valve for the main is located at the street. If your water main is above-ground and runs through your house, the main shut-off valve is typically located in an outdoor utility room.Before you shut off the water main, make sure you have the following items on hand: - A wrench or spanner large enough to fit around the water main shutoff valve - PVC tape or plastic sheeting - A bucket or a large trash bag - A pair of heavy-duty trash bags - A wide-mouth pry bar - A padded floor scraper

Step 2: Shut off the cold water supply

Once you shut off the water main, you need to shut off the cold water supply. You can usually locate this shut-off valve in the same utility room as the water main shut-off valve. Once you locate the shut-off valve, turn it off. When you turn off the water supply for the tankless water heater, you’re shutting off both the hot and cold water supplies. This will help you figure out where the leaking water is coming from.

Step 3: Inspect the tankless water heater for leaks

Even the most reliable water heaters will occasionally develop leaks. If your tankless water heater is leaking water, you need to locate the source of the problem. In most cases, leaks will occur at the water supply pipe or the cold water supply pipe. The easiest way to locate these leaks is to shut off the water supply and turn the water main off at the street. Once you’ve shut off the water supply, you can turn the water main back on again and let the tankless water heater run dry.If you see water leaking from the water supply pipe or from the hot water supply pipe, you’ll need to repair the leaks before you can continue. When you’re repairing a water supply pipe leak, you’ll need to identify the source of the leak. The best way to do this is to shut off the water supply again and turn the hot water supply temporarily off. Once you’ve shut off the hot water supply, you can turn the cold water supply back on and let the tankless water heater run dry. Once you’ve identified the source of the leak, you can repair it. If you can’t identify the source of the leak, you should call a plumber to repair the pipe.

Step 4: Examine the tank for leaks

If your tankless water heater is leaking water, you’ll need to find the source of the problem. In most cases, leaks will occur at the water supply pipe or the cold water supply pipe. The easiest way to locate these leaks is to shut off the water supply and turn the water main off at the street. Once you’ve shut off the water supply, you can turn the water main back on again and let the tankless water heater run dry.If you see water leaking from the water supply pipe or from the hot water supply pipe, you’ll need to repair the leaks before you can continue. When you’re repairing a water supply pipe leak, you’ll need to identify the source of the leak. The best way to do this is to shut off the water supply again and turn the hot water supply temporarily off. Once you’ve shut off the hot water supply, you can turn the cold water supply back on and let the tankless water heater run dry. Once you’ve identified the source of the leak, you can repair it. If you can’t identify the source of the leak, you should call a plumber to repair the pipe.

Step 5: Turn off the gas supply if your tankless water heater runs on gas

If your tankless water heater is connected to a gas line, you may need to also turn off the gas supply. If you can’t shut off the gas supply, you’ll need to turn off the gas at the main gas line. If your house has a natural gas supply, you should shut off the gas supply at the main gas line. If your home is connected to a city-provided gas line, you may need to contact the gas company to shut off the gas supply.

Step 6: Turn off the electricity supply if your tankless water heater runs on electricity

If your tankless water heater is connected to an electric line, you may need to also turn off the electricity supply. If you can’t shut off the electricity supply, you’ll need to turn off the electricity at the main power line. If your home has a natural gas supply, you should shut off the electricity supply at the main power line. If your home is connected to a city-provided electricity line, you may need to contact the electricity company to shut off the electricity supply.

After you’ve fixed the leaking tankless water heater

Once you’ve found and fixed the source of the tankless water heater leaks, you’ll need to re-check your water meter. Once you’ve re-checked the water meter, you can re-turn on the water supply to the tankless water heater. You can then begin the process of turning the water main back on.If you’ve fixed the leaking tankless water heater and determined that the water supply to the tankless water heater has been shut off for a prolonged period of time, you’ll need to re-check the water meter. Once you’ve re-checked the water meter, you can re-turn on the water supply to the tankless water heater.