Product review (1 stars): DOESN'T FIT OLDER WHIRLPOOLS!
<a data-hook="product-link-linked" class="a-link-normal" href="/EveryDrop-by-Whirlpool-Refrigerator-Water-Filter-5-Pack-of-1/dp/B00U264W0Q/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">EveryDrop by Whirlpool Refrigerator Water Filter 5 (Pack of 1)</a>&nbsp;Never got a chance to use it since it would not fit my 2005 Whirlpool side-by-side as described due to a redesign of the product. I wish I'd read the negative reviews before I purchased it. One review shows photos of 2 different designs and mine doesn't use either. Whirlpool has replaced/redesigned the Whirlpool 4396508 filter. I called the support number on the box, they told me to call Amazon. When pressed, told me "it can be a bear to put in." Told me when I got to the stop point, pull it out 1/4" then push it in while turning it 1/4" clockwise turn to lock in place. If it still didn't fit I was told I probably ruined my "housing"  by using cheap filters in the past. Didn't work. I put my used filter back in without a problem and went to a plumbing supply store. I brought the used filter and the EveryDrop with me. the holes and side notches are completely different.  He said Whirlpool has been causing them a lot of problems with their redesigns over the past several years. He told me if my housing was damaged, my used filter wouldn't fit and my fridge would most likely be leaking.  Turns out, my old filter "EcoAqua", was the original filter designed for my refrigerator. I'd keep using that brand, but I want more pollutants taken out of my water. I've decided to have a plumber set up an "inline" water filter to my frige from the basement.