If seals show signs of wear or deterioration they should be replaced. The placement of the seals are between the threaded connections of the filter, water collection bowl, and Twist&Drain valve. When purchasing a water collection bowl or a Twist&Drain valve, one seal will be included.
Cross Reference For 23300-0L110
23300-0L110 23300-0L111 23300-0L091 23300-OL090