About this item

• Standard Size: The 2 o-rings included are 5.8” in diameter and fit most standard 10"x4.5" undersink water filter systems(e.g. iSpring US21B), whole house water filtration systems(e.g. iSpring WGB21B, WGB21BM, WGB21B-PB, WGB12B), whole house descalers(e.g. WDS80K, WDS150K), and most standard housings for 10" x 4.5" filters.
• Peace of Mind Customer Service: Register online to activate your manufacturer warranty and life-time free tech support. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help!
• Please note: The o-rings are for 10"x4.5" filter housings only. If you need replacement o-rings for reverse osmosis (RO) pre-filter housings used in our RCC7 series, please consider iSpring ORFX3.