The filter element is changed once every six monthsWhen I heard that my water purifier changed the filter every six months, my jaw was shocked. I also heard that it costs nearly 1,000 yuan to change the filter element in my house, and bluntly said that I am "a stupid person with a lot of money", and clamored for me to invite her to a big meal.
After careful inquiry, I realized that the way I changed the filter was completely wrong. Hair**:"That's what the merchant would suggest, but there aren't many people who really take it as well as you. ”
How often the filter element is replaced
Two basis
The basis for replacing the filter element at home is the prompt on the water purifier: it will prompt me to change the filter cartridge in about half a year, and it will change it as soon as it prompts. Fa Xiao asked me rhetorically: If you haven't used water for half a year, do you have to change it?
The filter element replacement reminder on the water purifier is based on the time, and the reminder will be given when the time is up. However, the amount of water consumed has the greatest impact on the life of the filter element
Obviously, this basis is completely wrong, and there are two reasons for the correct filter change:
See the speed of the water——The water purifier has a parameter called "flux", which can calculate the water output speed of your own water purifier through the flux parameter. The formula is velocity = flux 24 60 379」▽
For example, if the flux is 1000g, the water output speed is 26l/minA 500ml bottle of mineral water can be filled in about 12 seconds. When the water outlet velocity is less than 1 2 of the theoretical speed, it means that it is time to change the filter element. If the mineral water bottle mentioned above is not full in 25 seconds, it is time to change the filter element.
Look at the concentration of pure water ions- Spend twenty or thirty yuan to buy a TDS pen to measure the ion concentration of filtered water. If the ion concentration exceeds 10 mg L, it is not considered pure water, and if it exceeds 50 mg L, it cannot be drunk directly.
Generally, the ion concentration of the new filter cartridge will be below 5mg L after filtration, and it will reach more than 10mg L after one and a half years of use. At this time, if the water quality requirements are not high, there is no need to replace the filter element.
When the ion concentration of the purified water is close to 50 mg l, it is never too late to change it.
What about the fuselage alarm?
Four methods
I know that most water purifiers only use indicator lights to prompt, but my water purifier in my house will sound an alarm. It's just that I'm too troublesome to change the filter cartridge frequently. Send a small to tell me, I don't want it to alarm can be reset:
Directly press the Reset button;Read the manual, and press and hold both buttons at the same time;
Remove the filter and put it back in;
Tap Reset via the mobile app.
There are only four common ways to reset. If you don't understand how to operate, you can call the manufacturer's 400 after-sales ** to manual customer service, this customer service is the most reliable, and will tell you the reset method.
How often the filter element is replaced
Three effects
So how often do you change the filter? The answer sent to me is: Not necessarily!
Because the water quality varies from place to place, you can use the TDS pen mentioned above to measure the ion concentration of tap water. TDS with good water quality is less than 100mg L, and poor water quality can reach more than 500mg L. The worse the water quality, the more often the filter element will be replaced.
In addition, there is the amount of water used by the household:The greater the amount of water used, the more frequent the replacement.
Finally, it is also related to the flux of the water purifier:The higher the throughput, the more durable the cartridge will be. RO membrane filters above 1200g can be used for at least five years, and RO membrane filters over 1500g can be used for up to eight years.
"Is it just a matter of changing the RO membrane filter? ”Fa Xiao replied: RO membrane is the most important filter element, as long as it can still be used, even if other filter elements are removed and thrown away, it will not affect the filtration effect. Therefore, the frequency of replacement does not need to consider other filter elements, and it is enough to replace one piece when changing the RO membrane. How to buy the cheapest filter cartridge?
Two paths
For my practice of spending hundreds of dollars every time I change the filter element, Fa Xiao also said "unnecessary". I buy it through the aftermarket every time, and it's naturally the highest. In fact, in another way, you can lower the **.
The filter element of the water purifier can be roughly divided into two types:
One is a traditional filter cartridge, and it goes like this
This type of filter cartridge is relatively inexpensive, and you can buy it yourself onlineGeneral purpose cartridges。As long as you remember what the flux of your own water purifier is, you can easily buy it. The cost of replacing a set of filter elements is generally about 300 yuan, but you need to install it yourself.
When you buy a water purifier, you will be given a plastic sleeve, which will be stuck on the filter cartridge of the water purifier and rotated to open. Just pull out the old filter and put the new filter inside.The other is a composite cartridge, which looks like this
This type of filter can only be purchased from the original factory, and each model corresponds to one type of filter. There is no universal product, ** will be a little higher. But buying in the official *** is also much cheaper than buying from the after-sales service, and it takes about 500 yuan to change a set.
It's easy to replace, and the cartridges are hidden inside a plastic case. When replacing, just pull out the old shell and stuff the new shell in. The selling point of the composite filter element is "easy to change the filter element", if you spend money to hire someone to replace it, this money is too unjust.