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What is a effective way to clean the inside of copper fittings after sweating them together?
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If they're not attached to anything, maybe soak them in PBW for 30 minutes? If they're attached in a system, run PBR through the system for a few minutes. Either way, then rinse, sani, and brew!
I've watched plumbers fix various pipe joints in the past, and they typically run water through them for a few minutes and then declare it good to go.
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