【Root cause one: limescale】

First of all, we need to know why the water flow of the electric water heater has become smaller? There is only one reason: it is blocked. That is blocked by what? It is true that there is sediment in the tap water, but the probability is still blocked by limescale.

So we have to do the first step, is to clean up the scale. Take apart the electric water heater, the inner liner can see a thick layer of scale. First, take out the scale by hand, and then use a special cleaning agent to clean up the debris attached to the inner liner.

This process is simple to say, but must be operated by professionals. The wiring in the electric water heater is very complex, a little carelessness will break, which in turn will lead to water heater leakage, the consequences are endless.

Tap water heating, basically, will produce scale. So electric water heaters need to be cleaned every once in a while.

If you do not want to clean up too often, you can properly reduce the set temperature of the electric water heater - set at 55 ℃ or more, each increase of 1 ℃, the rate of limescale production nearly doubled.

【Root cause two: magnesium rod】

All electric water heaters will have magnesium rods, its use is said to be very mysterious. What waterproof scale, leakage prevention, etc., but in fact it is not so magical.

The real role of magnesium rod, is to attract limescale. Let the scale actively produced on the magnesium rod, thus avoiding the inner liner of the electric water heater is corroded. But in the process of attracting limescale, is going to cause some corrosion on the magnesium rod itself.

Over time, two problems will occur.

The first is that the magnesium rod is no longer available and scale begins to appear in other locations in the liner. Can not be gathered on the magnesium rod, resulting in scale is more likely to appear in the water flow - along with the flow of water out, it is easy to cause the pipe blockage.

The second is the magnesium rod in the process of being corroded, there is a possibility of dropping magnesium slag. Magnesium slag is a metallic solid that can get stuck in the middle of the pipe like limescale and cause a blockage.

Therefore magnesium rod needs to be replaced regularly: the replacement frequency is related to the water quality, generally 3 to 5 years to replace once.

【Plugging point one: anti-electricity wall】

Solve the above two problems, hot water will no longer have a constant source of clogging inside. The next thing to do is to unclog the pipes that have been blocked. Where are the pipes easily blocked?

The first blockage point is the anti-electric wall - nowadays, electric water heaters are generally installed anti-electric wall. The anti-electricity wall is generally installed in the inlet and outlet of the electric water heater, and can be seen from below looking up.

The structure in the anti-electricity wall is a spiral slim small pipe. The purpose is to increase the resistance of water flow by increasing the length of the water flow, while reducing the diameter of the water flow. When the length increases and the diameter decreases, the resistance becomes greater - thus preventing someone from being electrocuted after a leak.

But this curved and thin pipe can easily be clogged, and it can't be unclogged after clogging. You can take the wall down and test it when you disassemble and clean the electric water heater, and if it is confirmed to be clogged, you can replace it.

Anti-electric wall is very cheap, through the brand after-sales replacement set (two), the price will not exceed 50 yuan.

【Plugging point two: the spout】

Whether it is a faucet or a shower, their water outlet location is very thin small holes. Shower needless to say, small holes we can see. Faucet looked at the outlet is very large, but in fact, there is a bubbler above.

The initial purpose of the bubbler is to add air to the water, so that the water column thickens, so that when washing hands can increase the contact area between the skin and water. But these small holes, in effect, also became a "filter".

With a live wrench or pliers stuck to the top of the faucet, you can remove the bubbler.

Clean up these small holes, you can first try to use a needle: use the tip of the needle to poke one hole at a time, to plug the hole on the scale poke down. You can also go downstairs to the hardware store to buy some descaling agent, the descaling agent and foamer (shower) piece soaked in water for a few hours.

If the local water quality is poor, it is recommended not to choose too small, too dense foamer, or shower.