Product review (1 stars): Horrible worthless purchase
I purchased these filters as replacements for GSWF. What a waste of time and money. I installed these and they did not allow water to flow. I was so pissed I threw them in the garbage. I also went on EBAY and purchased 2 original unused GSWF filters for $27.00 They worked wonderful. Sorry Amazon. I am truly disappointed on this purchase. Be wise do not purchase these replacements they are useless.