Product review (4 stars): Need to explain the Black Washer pictured.
Good Product.  However...suggest that You point out on product info that the black washer is not necessary to have
when you purchase the product...the black washer costs more than the filter.  I installed my new filter WithOut a
washer and checked for a couple of days for any leaks.  I was pleased there were no leaks.  You need to make it
as easy as you can for customers to know all details.