When to change&replace water filter ?

When to change&replace water filter ?

If you are using home water filter you should know when to change or replace the water filter.Everyone knows that the quality of water can directly affect our health, because more than 70% of the human body is made of water. Medical research statistics show that adults should consume at least 2L of drinking water a day (the reason for 8 glasses of water), which does not include the water we use for eating, washing, bathing, cooking, etc. Therefore, to ensure the quality of domestic water is to protect the health of us and our families. In the current era of frequent water pollution, although we cannot change the environment, we can still ensure the safety of drinking water for family members through household water purifiers!
In the long-term use of the water purifier, in order to ensure the quality of water purification, we need to clean the water purifier regularly, especially the filter element of the water purifier. In addition to cleaning, it must be replaced regularly. But most of of us don't know when to change water filter,this involves our topic today. How often is the filter element of the water purifier replaced?


Before answering this question, we must first understand: What is a water purifier filter element?

Relevant information shows that the earliest water purifier filter element is only one level, made of ceramics. It has been developed to increase the water purifier filter element to level 4-5. It is not only to ensure the water purification effect, but also to reduce the residual impurities intercepted by each level of filter element. , Extend the service life, convenient for users.
But in general, the water filter cartridges on the market can be roughly divided into the following categories:

1. The PP cotton filter element has a filtration accuracy of 1~5μm.

Function: The use of melt blown filter element is made of polypropylene ultrafine fibers by thermal fusion entanglement. The fibers form a three-dimensional microporous structure in space in a random manner,which distributed the pore size in a gradient along the flow direction of the filtrate.It is generally used To intercept large particles of impurities, such as suspended solids in water, sand, rust, etc.
Applicable occasions: groundwater/surface water primary filtration, water purifier pre-filtration, generally used for the first-stage filter element of water purification equipment.
PP cotton filter replacement cycle: 3 to 6 months

2. Activated carbon filter .

Function: There are two common types of granular activated carbon and sintered activated carbon, both of which are made from high-quality coal, wood chips, nut shells, coconut shells and other materials through advanced process equipment and multiple steps such as high temperature, compression and sintering. Generally speaking, the larger the surface area of ​​carbon particles, the stronger the adsorption effect, and the higher the filtration accuracy, the better the filtration effect.
Uses: Mainly used to absorb residual chlorine, different colors, odors, etc. in the water. Generally, the water purifier is equipped with front granular activated carbon, front sintered activated carbon and rear activated carbon with silver. Antibacterial effect to ensure the freshness of the effluent!
Activated carbon filter replacement cycle: 6 to 12 months

3. KDF (copper, zinc alloy) filter element is mostly used in central water purifiers.

Function: Use electrochemical redox (electron transfer) to remove chlorine and heavy metals in water and inhibit bacterial growth.

Applicable occasions: mixed with activated carbon for filter element to increase the service life of activated carbon.

KDF filter replacement cycle: about 12 months.

4. Resin filter elements are mostly used in water softeners.

Function: Soften hard water by ion exchange, remove calcium and magnesium ions, etc.

Applicable occasions: household soft water, reverse osmosis pretreatment, etc.
The resin filter element does not need to be replaced. It is enough to replenish the salt regularly. Generally, the salt consumption is about 30%, and it is time to replenish it.

5.Microfiltration (MF)-ceramic filter element.

Function: The ceramic filter element is sintered with natural diatomaceous earth. There are numerous small pores inside, the porosity is as high as 80-90%, and the pore size of the filter element is less than 0.2μm. Filter out suspended solids, microorganisms, bacteria, rust, etc. in water.
The ceramic filter element has a long life. If the maintenance is in place-often use a brush to wash and sandpaper. The general replacement cycle is from six months to one year.

6. Ultrafiltration membrane (UF)

Function: Bacteria and colloids, rust, suspended solids, silt, and macromolecular organics that are much larger than bacteria can be intercepted by ultrafiltration membranes, which are generally used in the third stage of water purifiers. The filtration accuracy is 0.01μm.
Ultrafiltration membrane filter element replacement cycle: generally 10-12 months.

7. when to replace RO membrane

Function: The pore size of RO membrane is one-two hundred and sixty thousandths of hair, which is 5000 times smaller than the diameter of bacteria and viruses. Therefore, only clean water molecules can pass through, and all other bacteria, viruses and heavy metal ions will be affected by it. Intercept, the filtering accuracy reaches 0.0001μm.
Because the pore size of the reverse osmosis membrane is small, the reverse osmosis filter element is easily blocked by impurities and loses its function. In order to prolong the service life of the RO membrane, it is necessary to perform pretreatment such as pp cotton and activated carbon filtration. The RO membrane is generally used in the fourth stage.The general replacement cycle is one to two years.

So how do you know when your water filter needs to be changed?



Generally speaking, the filter element has a replacement cycle, but the specific filter element replacement time still needs to be changed according to the user's water source water quality and the amount of purified water used, but the filter element should be replaced in the following four situations.

①The water flow rate is obviously reduced. It means that the filter element is clogged, and the filter element should be cleaned to restore the normal flow rate. After cleaning, the flow rate is still small, and you need to replace the water purifier with a new filter element; replace the troubleshooting method, step by step from the primary PP cotton filter element to the back, until the water output is normal until;

②The taste of the effluent drops, and the taste is similar to that of tap water, and the residual chlorine taste of the tap water cannot be removed, indicating that the activated carbon filter element has been saturated with adsorption, and the activated carbon filter element should be replaced.
③The RO membrane reverse osmosis water filter generats water too fast. The RO membranehe water purifier has a noticeable increase in water output. The RO membrane is what generally creats this situation. At this time, we must replace the RO membrane with a new one, otherwise the reverse osmosis water purifier will lose the core heavy metal ion filtering function.

④The filter of the water purifier is expected to reach 80% of its service life regarding to time. The service life of the filter element is the useful life under ideal conditions. For communities of those with serious water pollution, the filter element cannot function for a long period of time. Therefore, the filter element suppose be replaced when the use time makes up about 80% of its ideal life.
Finally, I would like to remind everyone not to forget to disinfect the water purifier. In the occasion of replacing the water purifier filter element, it is required to disinfect and properly clean the water purifier filter element shell, inner wall, and water outlet pipe to avoid secondary pollution of the water purifier filter element caused by residual impurities. In addition, when we replace the filter element of the water purifier, each part of the components should be put away, so as not to find it when they are installed back, which will affect the reuse of the water purifier.