[Tom Wesenberg]

I always solder leaks in brass floats. Heat the float with a hair drier and have the leak down, so the gas squirts out. You may have to heat and cool the float a few times to get all the gas out.nThen clean the area by the leak and use rosin core solder to seal the leak. On the final hole to be soldered you need to work fast so the float doesn't heat up and blow the solder out. That's why you see a small soldered hole of brass floats. After the seam is soldered all around, then the small air escape hole is soldered shut.