storage-type electric water heaters and quick-heating electric water heaters A common fault is water leakage. After reading this content, you know that there are three reasons for electric water heater leakage, so you can repair it yourself. NS.
Storage-type electric water heaters and instant electric water heaters are home appliances that provide domestic hot water. Everyone is familiar with them. As a home appliance that provides hot water, water leakage is a common problem that users encounter. There will be water leakage in those locations, the reason for the water leakage, and how to deal with it, you will know after reading the introduction.
Electric water heater tank leaking
One: Electric water heater tank leaking
Traditional storage type electric water heater has one for the water storage tank, instant electric water heater has two An inner tank used to store water. The inner tank is welded by carbon steel materials. There are at least four welds. During the welding process, welding quality problems occurred, which buried hidden dangers of water leakage.
Traditional electric water heaters will produce scale during heating and use. Each time a little, every time, it will store more and more. The accumulated scale will be corrosive and will cause corrosion to the metal inner tank, and the weld is the first Once the inner tank has a quality problem during welding, the location corroded by scale will attack the welded joint with quality problem. As the scale continues to corrode, water leakage in the inner tank will appear.
Water leakage in the inner tank mainly occurs at both ends of the electric water heater. Once the inner tank leaks, it means that the electric water heater is scrapped. Some people may ask why the leakage of the inner tank will cause the electric water heater to be scrapped? This is because the liner has a layer of enamel coating. The enamel coating protects the metal liner from rust and scale. If the liner leaks, it means that the enamel coating has been cracked and damaged.Once the enamel coating is cracked and damaged, it cannot be repaired.
If the inner tank leaks slightly and is not serious, you can continue to use it; if the inner tank leaks serious, you can only scrap it and buy a new electric water heater.
Electric water heater tank leaking
Two: Water leakage at the joints of the electric water heater
Any product joint is prone to problems, and traditional electric water heaters are no exception, involving leaking joints There are four parts, three in the lower part of the electric water heater, from left to right: 1. Sewage outlet 2. Hot water outlet 3. Cold water inlet, one is in the middle of the right side of the electric water heater, which is the method of installing heating rods in the inner tank Lankou (the right side cover needs to be opened to check for water leakage in this part). These four parts are also welded to the inner tank. If the water leaking from these four positions has obvious rust color, most of the welding positions appear Water leakage. Water leakage occurs in these four welding positions, which means that water is leaking from the inner tank. The enamel coating of the inner tank is cracked and damaged and cannot be repaired. If the water leakage is slight, from the perspective of economy , It can still be used until the leak is serious, it is replaced.
If the water leaking from the three positions of the sewage outlet, hot water outlet and cold water inlet has no rusty color, it is mostly because the nut is a little loose or the water leakage caused by the aging of the rubber pad. Tighten the nut or replace it. Just click on the rubber pad to solve the water leakage problem.
Electric water heater hot water outlet cold water inlet leaks
Three: Pressure relief valve leaks
The pressure relief valve of the electric water heater is a safety accessory, when the pressure in the inner tank exceeds a safe value , Automatically open to release the pressure to prevent explosion, so the pressure relief valve is also called safety valve.If there is water leakage between the upper part of the pressure relief valve and the water inlet interface nut of the electric water heater or the lower part and the tap water interface nut, you can tighten the nut or replace the aging rubber pad, and the water leakage problem can be solved.
Water leakage at the lower interface of the pressure relief valve
Pressure relief valve location diagram
If the pressure relief valve itself leaks, there are three situations.
1. Water leakage caused by the user's higher heating temperature setting
Some users set the heating temperature at 70-80 degrees in order to produce hot water for a longer time, and the inner tank temperature is high, so the corresponding internal The pressure of the bladder should be higher. If the water inlet pressure of the user's home is already high and the temperature setting is high, the pressure of the heated inner bladder will be higher, and a slight pressure relief of the pressure relief valve will occur, and the pressure relief valve drain hole will appear. Water leakage.
When the temperature of the inner tank drops, the pressure relief valve does not leak. In fact, this is a normal phenomenon of water leakage, indicating that the pressure relief valve can work normally to ensure safety. So we will see some users put a thin plastic hose on the drain hole of the pressure relief valve to lead the leak down. If the user does not want to see the pressure relief valve leaking, you can try to reduce the heating temperature and reduce the pressure of the inner tank to eliminate this leakage.
The drain pipe of the drain hole of the pressure relief valve
2.Water leakage caused by the high pressure of the tap water of the user's home
National safety standard It is 0.6 MPa (6 kg), and the manufacturer will generally reach 0.75 MPa (7 kg). Our tap water pressure is generally 0.7 MPa (7 kg). As long as the user's tap water pressure is around 0.7 kg, which is within the safe pressure range of the inner tank, the pressure relief valve will not release pressure, and there will be no drain holes. Water leaks.
The tap water pressure in some users’ homes may exceed 0.75 kg,For example, if the pressure valve is not installed for secondary water supply, the water pressure will dare to the working pressure value of the pressure relief valve. Under the long-term high water pressure, the spring of the pressure relief valve will be reduced in effect and water leakage will occur. Encountered this problem, one is to replace a new pressure relief valve, and the other is to install a pressure reducing valve on the water inlet pipe to reduce the pressure of the tap water.
Water leakage in the drain hole of the pressure relief valve
3. Water leakage caused by the internal scale entering the pressure relief valve
Traditional electric water heaters will produce scale due to overall scaling and heating methods. When the scale accumulates, it will enter the pressure relief valve through the cold water inlet, block the pressure relief valve, and make the pressure relief valve unable to close normally and cause water leakage. In this case, you need to remove the pressure relief valve to flush the scale, and it cannot return to normal after flushing. , You need to replace a new pressure relief valve.
4: Water leakage in the external power wall of the electric water heater
The appearance of the power wall greatly reduces the leakage of the electric water heater. The probability of water leakage in the external power wall is very high. Low, if there is a leak in the power wall, you need to buy a new power wall to replace it. If there is water leakage at the upper and lower ends of the power wall, tighten it or replace the aging rubber pad to solve the water leakage problem.
The external electric wall of electric water heater
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