Also
Hi,
First, are you certain that it is bronze? Many allegedly bronze fittings are actually brass, including those made of "naval bronze" and "manganese bronze."
Second, while bronze is much more fatigue-resistant than stainless, it will harden in time. If this is an old fitting, used regularly, it might need to be annealed.
Third, bronze is less noble than stainless, so a prime place to check for galvanic action is under fasteners.
Fair leads,
Brion Toss
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