Product review (1 stars): I have a Whirlpool Gold side by side stainless steel ...
I have a Whirlpool Gold side by side stainless steel refrigerator that uses the Pur Filter1 water filter.  I have a reverse osmosis system so do not want/need to spend a fortune on filters.  This plug DOES NOT FIT over the are where the Filter1 goes.  It is too small.  There should be more information about where this plug fits and which filters it can replace.

UPDATE: I went to the website AppliancePartsPros.com and asked on the website for help.  Many people have!  I found out my fridge doesn't need a bypass plug or a cap after all!  the ice maker and water dispenser works if I simply pull out the Filter1!