Peter S San Dimas , CA April 11, 2021 When you replace the filter several times, the o ring tends to enlarge and not seal correctly I used a nipper to carefully cut about 3/4" out of the O-Ring, carefully placed the large part of the O-Ring into the groove designed for its' placement and screwed the new filter back in place. After checking for leaks I thankfully had none. Then I purchased a new O-Ring for next time. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes