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This O-ring is used in all of our standard whole house water filter packages including the WH1, WH1B+, WH2, WH3, WH4, WH5 Series, WH1-HF, WH1B+-HF, WH2-HF, WH3-HF, WHC+, and WH Chloramine. This 5 3/4" diameter FDA-Grade Buna-N O-ring is used in all 10" and 20" Pentek / US Filter Big Blue housings and should generally be replaced at least annually or whenever physical O-ring damage is noticed (stretched, cracked, etc.).
these were delivered in a fast time and I got the correct o-ring. the last company I used sent the wrong ones and it was too late to return them and I was out of some money. i was not happy but this experience with this company fixed it all. thanks
Vector Industries
Griswold
Vector Industries
Vector Industries
Lakewood Instruments
Watts
Lakewood Instruments