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"I have three filter housings that use these o-rings. Two for filtration and one for a salt free water conditioner. The filters are changed once a year and the water conditioner is changed 2 to 4 times a year. I always clean the o-rings and then re-apply the Silicone Lubricant (also from US Water) but with time the o-rings flatten. So every other filter/conditioner change, I replace the o-rings."



