I have some boiler piping that developed a pinhole leak in a BI fitting. I can gain access to the inside of the fitting but it would require tons more work to remove it for replacement. The rest of the piping is a mix of copper w/sweat fittings and threaded BI. What I'd like to do is put a dab of silver braze (or other braze) on the pinhole from the inside. providing the fitting is not riddled with corrosion I was thinking the following.. drill the pinhole, clean it in & out , heat & flux & braze. I'm thinking silver braze (Harris 56%) because I have some (1/32") but I welcome any suggestions on filler type, flux & tech. I figure since the leak is in the pipe and not the boiler this should work ok, also many of the pipes are soldered so the braze should be plenty strong.
Thoughts & suggestions ?
Andrew