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1. Do Polar filters have NSF certification?

WQA and NSF are two non-profit organizations. They are using the exact same 
standard for water filters, which is NSF42, Polar filters passed WQA NSF42 
tests, got WQA Gold Seal certification for NSF42 and NSF372 lead free.

2. What’s the difference of NSF51/61, NSF42 and NSF53?

NSF51/61 is the standard of filter materials such as activated carbon material. All the 
materials of Polar filters are also NSF51/61 certified. The certifications are made by 
the material suppliers.

NSF42/NSF372 is basic certification to certify that Polar filters are safe to use and have filtration effects. Polar filters passed the tests of Material Safety, Structural 
Integrity and Chlorine removal rate, and NSF372 lead free.

Material Safety – The filters do not have harmful materials.

Structural Integrity - The filters can bear high water pressure. NSF42 standard is about 350psi. We here test the max. pressure under 380psi per 2 hours per day in our lab.

Chlorine Removal Polar filters chlorine removal rate is 99.06%
NSF372  Polar filters do not have Lead in the materials.

NSF53 is mainly functional certification, such as removal ability to heavy metal, VOC, etc. The filter materials need to be added additives to remove those harmful 
substances in water.

3. What filter media Polar is using?

Polar filters are using our own made Carbon Block Filter. The filters are made by sintering technology, the same technology known as “Black miracle”. Few factories can make high quality sintering carbon block filters. These filters have much better filtration effects to the filters made by 
traditional extruding technology.

4. Complaint about “Not match”

Some filter head (the part in the refrigerator, connected with filter) manufacturers may change the design of the filter head, to stop the compatible filters were used on their filter heads. But this does not happen often. Our solution is to collect as many filter heads as we can regularly from different channels; To some models, to avoid patent issue, we amended the filters appearance, especially the connect part (cause 
generally the connect parts are the patent claims), some customers found it looks different with the original filter when they get the filters, they do not try it, then say it does not match their refrigerators.

5. Complaint about Leakage

Plastic parts have tolerance. So the filters and its O-ring have tolerance on the 
connection parts, the filter heads and its O-ring in the refrigerators also have 
tolerance. Installing in the new refrigerator, your may feel a little tight; while in the old 
refrigerators, you may feel it is easier to install the filters. Sometimes even too loose, 
then there is leakage. It mostly because the O-ring on the filter head has been used for
long time, lack of elasticity or the tolerance of our filters and the filter heads are a little 

6. Complaint about Flow Slowly

Most original filters have a flow rate of 0.5gpm/1.9lpm. Our actual flow rate is 1.9-2.2 
lpm. If the users feedback their filter flow slowly, mostly because the filter did not 
connect well by the best way. Reason is similar as the above--filter heads have tolerance, 
filter heads have been used for several years.

7. About the Carbon Media

The carbon material and binder we used are all famous brands. The Activated Carbon 
is Jacobi brand, IV>1050, NSF certified. The Binder is from Celenese Germany factory, 
NSF certified. Both grades we are using are the same used name brand filters. 

•All the filters are tested and certified by WQA to NSF/ANSI
 42 for Material Safety and Structure Integrity. Tested 
 against NSF/ANSI 42 for Chlorine Reduction. Tested and 
 certified to NSF/ANSI 372 for Lead Free Compliance.

•All the filter materials are certified by NSF to NSF/ANSI 51, 
 NSF/ANSI 61. 

•All the components and the filters are tested to meet EC 
 1935/2004 Regulations. 

•Manufactured in an ISO9001 facility.