How to remove scale of electric water heater?
The base that needs to open the outlet. This requires professional tools (such as an inner horn wrench, etc.); dilute hydrochloric acid, 1-1.5L, home toilet, toilet cleaner is this. If you can't find the reagent store, use that instead; prepare one or two towels. Concrete operation method: (1) close the water inlet valve of the water heater, disconnect the connecting pipe between the water inlet valve and the water heater; (2) open the water outlet valve and drain the water heater;(3) removing the drainage valve base (note the strength, do not destroy the thread);(4) with a dry towel from the drain carefully into the inside of the water heater, which will drain the remaining water slowly (this must be patient), the general water heater to protect the heating part, there will be residual 1-2 premium;(5) will dilute the inside of the water heater into the hydrochloric acid through the drainage holes (note the water heater material, water heater, stainless steel or general ceramic liner with dilute hydrochloric acid cleaning is no problem, other metals should pay attention, some should be used to dilute sulfuric acid), don't let the corrosion of hydrochloric acid drainage hole;(6) leave aside for 1 hours, then slowly dilute the hydrochloric acid, and then let stand for 1 hours until all the scales are removed. If the scale is more, the amount of dilute hydrochloric acid can be increased;(7) use a dry towel to clean up all the reaction leftovers, connect the inlet pipe, open the inlet valve, and carefully clean the water heater once or two times. Rinse the water at the bottom of the water heater by applying a towel and rinse it second times to prevent dilute hydrochloric acid from remaining;(8) close the inlet valve and restore the outlet pipe base and outlet pipe. At this point, the water heater descaling completed.
Mild cleaning: DIY electric water heater, please clean every 3 years, every six months you can wash your own small, clean steps are not complicated, you can do it yourself. Step 1: Unplug the socket and close the two triangle valves. The second step: unscrew the hot water nut, and plug the hot water to prevent the water from flowing out of the heater. Unscrew the cold water outlet nut at the same time, connect the hose (sprinkler pipe), drain until the cold water does not flow out, and the 50L water heater is drained for about 1 hours. The third step: the cold water hose to the mouth of the unloaded, the hose end to the hot water outlet, an end to the faucet, turn on the tap water for 1 minutes, and blocked the cold water port, let cool water in a tank, and then open the cold water drainage, repeated several times, until the water is clean. The fourth step: screw the cold water mouth, the hot water mouth nut, open the triangle valve, and turn on the hot water of the water heater faucet. After the water flows out, it can be closed. Cleaning notes: before washing, the water temperature of the water heater should be below 50 degrees Celsius. This water temperature can be directly discharged into the sewer pipe and will not affect the pipe. When cleaning, the water heater can be opened at the same time if there is a sewage outlet, because the position of the sewage outlet is lower than that of the cold water, and the sewage discharge is more thorough.
Deep clean: please professional maintenance work according to the water heater, every 3 years, will be a deep cleaning, deep cleaning need to open the water heater repair hole, therefore, to ensure safety, the best professional maintenance cleaning.
