Product review (2 stars): BEWARE OF MISSING SEAL!!!
<a data-hook="product-link-linked" class="a-link-normal" href="/Tier1-UKF8001-Replacement-Maytag-UKF8001-EDR4RXD1-Whirlpool-4396395-PUR-Jenn-Air-Puriclean-II-469006-469005-Refrigerator-Water-Filter/dp/B019R5UU4O/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Tier1 UKF8001 Replacement Maytag UKF8001, EDR4RXD1, Whirlpool 4396395, PUR, Jenn-Air, Puriclean II, 469006, 469005 Refrigerator Water Filter</a>

Ordered one of these cheap generic replacement water filters a while back. Followed instructions for install/flush. However, there was always a gurgling sound from the refrigerator when dispensing water, and what seemed to be bubbles with splashes. Never happened with the OEM filter that came with our fridge. Seems air was getting in the line somewhere.

Now, after replacing with the same second filter, we find out the cause for the weird air leak into the system. The first one came without the required seal! See the attached photos. The one on the left was the first one we ordered; the one on the right is the new one we just received with the required seal. The seal interfaces with the flat surface of the filter connection. When the filter itself is missing its seal, then you are just relying on the connector's O-rings, which is apparently insufficient. Note the second picture of the connection, and that there is no filter seal that has fallen off anywhere. It was just straight missing. The dark ring in the mouth of our first filter is likely from the connector's big O-ring interface and carbon blow-by.

Check your new water filter for a seal. If it didn't come with one, exchange it immediately!