Is It Safe to Use PEX B Fittings on PEX A Pipes?
During a residential plumbing retrofit, I encountered a system where the previous installer had mixed PEX-A pipes with PEX-B fittings. The resulting leaks and connection failures taught me valuable lessons about the importance of material compatibility in PEX systems. Using PEX-B fittings on PEX-A pipes is generally safe only with mechanical connection methods like crimping
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