O-Rings for all US Water 4.5″ Blue Filter Housings – 3 Pack
- Also fits Liquatec and Hydronix 4.5″ housings
- It’s always a good idea to have spares
- Be sure to lubricate o-rings with silicone, not vaseline or petroleum-based products (Silicone lubricant sold separately)
- Buna-N O-Rings
- Pack of 3
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