Over time, a tankless water heater can accumulate mineral deposits that can build up on and erode the walls inside your tank's heating chamber. To properly maintain and clean the tankless water heater, you will need to flush and remove the mineral deposits from the tank at least once yearly. Continue on reading to learn how you can maintain your tankless water heater to ensure its optimal performance and efficiency. Step 1: Turn off the power source for the tankless water heater This can be performed by turning off the main gas or turning off the circuit breaker for electrical devices. Step 2: Close and turn off the 3 water valves attached to your tankless water heater. This approach will stop cold water from flowing into the water heater and stop hot water from coming out during the cleaning process. The water valves consist of a cold water valve that might be colored blue, a hot water valve that may be colored red, and a third main valve that runs the water into your home. Step 3: Remove the purge port valve caps slowly from the purge valves located on each of the cold and hot water valves. The purge valves have little handles that mimic the letter "T" This process is done to minimize any pressure that has built inside the valves and can prevent excess hot water from shooting out and coming into contact with your skin. There can be pressure when removing the purge port valve caps, therefore it's extremely essential to make sure the hot water valve is completely and accurately shut off for safety purposes. Handle each cap carefully to be sure the runner washer sealing discs stay in place, which are needed for your valves to function properly. Step 4: connect your hosing lines to all of the 3 valves. If your manufacturer of the tankless water heater failed to supply you with hosing lines, you can buy them from your retail store specializing in home repair or water heaters. The hosing lines must be long enough to get between the water heater and your bucket. You might need to consult your manual supplied by the tankless water heater's manufacturer or contact the manufacturer directly for precise directions regarding this procedure. Sometime, this procedure will require you to use a sump pump and connect hoses that will discharge and flush water from the tankless water heater using the cold and hot water valves. Step 5: Open the purge port valves by twisting them perpendicularly to the position of the cold and hot valves. Step 6: Use 2.5 gallons (9.46 liters) of undiluted white vinegar to clean the tankless water heater at all times instead of chemical substance solutions. Because your tankless water heater is most likely the source of all your drinking water and bathing water, using chemical cleaning solutions might be extremely harmful to your health. Step 7: Do the flushing and draining process by following the directions given by the maker of your tankless water heater. This procedure may take up to 45 minutes. Step 8: Close the purge port valves by turning the "T" shaped handles after the flushing process has been completed. Step 9: Disconnect and remove the hosting lines from each water valve. Step 10: Change the purge port valve caps onto the purge valves. Tighten the caps completely and securely without damaging the rubber sealing discs located inside the caps. Step 11: Refer to the manufacturer's handbook of your tankless water heater for exact instructions on how to safely re-start your water heater unit. This process can require you to rotate and open the cold and hot water valves so they are parallel to the position of the main valve that leads into the house. Step 12: Turn on the hot water tap in your sink little by little to let the air to move through the pipe. Continue to run the water till it runs steadily without air escaping. This process can take up to 2 or 3 minutes.
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Park Mechanical Plumbing & Sewer
8324 Luzon Ave.
Sacramento, CA 95828
(916) 231-5681
http://parkmechanical.com/sacramento-plumbing
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