Sealing the deal: Why it’s time to revisit the EPA 608 warning on silicone O-rings
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It started with a member’s question: “How do I know if there’s silicone in my A2L press-connect O-ring seals—and why is the EPA warning me about it?” That question sent us down the rabbit hole. What we found buried in the EPA Section 608 training materials is a blanket warning against silicone O-rings in mechanical fittings for A2L refrigerants.
David C. Bixby has been active in HVAC industry codes and standards for 35 years and is currently secretary for the ACCA Codes Committee.
Latest posts by David Bixby (see all)
- ACCA appeals NFPA ruling on GFCI nuisance tripping - September 25, 2026
- ACCA fights to extend GFCI exception - August 24, 2026
- Sealing the deal: Why it’s time to revisit the EPA 608 warning on silicone O-rings - August 28, 2025
Posted In: A2Ls, Aside, Refrigerants
