Over time, a tankless water heater can collect minerals that can build up on and erode the walls inside your tank's heating chamber. To effectively maintain and clean your tankless water heater, you need flush and take out the mineral deposits from your tank at least once yearly. Keep reading to find out how you can maintain the tankless water heater to ensure its optimal performance and efficiency. Step 1: Turn off the power source for your tankless water heater This would be performed by shutting off the primary gas or shutting off the circuit breaker for electrical devices. Step 2: Close and turn off the 3 water valves connected to your tankless water heater. This procedure will stop cold water from flowing into the water heater and stop hot water from emerging during the cleaning process. The water valves consist of a cold water valve that could be colored blue, a hot water valve that might be colored red, and a third main valve that runs the water into the home. Step 3: Take out the purge port valve caps slowly from the purge valves found on each of the cold and hot water valves. The purge valves have small handles that resemble the letter "T" This procedure is done to reduce any pressure that has built inside the valves and could prevent excess hot water from shooting out and coming into contact with your skin. There may be pressure when removing the purge port valve caps, therefore it's very essential to make sure the hot water valve is totally 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 correctly. Step 4: connect your hosing lines to each of the 3 valves. If the manufacturer of the tankless water heater failed to supply you with hosing lines, you can buy them from any retail store specializing in home repair or water heater unit. The hosing lines need to be long enough to get between the water heater and the bucket. You may have to consult your guide book supplied by the tankless water heater's manufacturer or contact the manufacturer directly for precise directions in regards to this procedure. Sometime, this procedure may require you to have 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 rather than chemical solutions. Since your tankless water heater is most likely the source of all your water supply and bathing water, using chemical cleaning solutions could be very harmful to your health. Step 7: Perform the flushing and draining procedure by following the instructions given by the maker of your tankless water heater. This process may take up to 45 minutes. Step 8: Close the purge port valves by twisiting the "T" shaped handles after the flushing procedure has been completed. Step 9: Disconnect and remove the hosting lines from each water valve. Step 10: Replace the purge port valve caps onto the purge valves. Tighten the caps completely and securely without damaging the rubber sealing discs found inside the caps. Step 11: Refer to the manufacturer's guide book of the tankless water heater for exact directions on how to safely re-start your water heater unit. This procedure can require you to rotate and open the cold and hot water valves so they are parallel to the position of the primary 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 pass through the pipe. Continue to run the water until eventually it runs steadily without air escaping. This procedure may 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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