Soldering a fitting that has a lip

[Stephen Tashiro]

The smooth part of the brass fitting in the photo goes into a 3/4 inch copper coupling. When I solder the fitting into the coupling should the raised lip on it fit snugly against the end of the coupling? Or should I leave a little gap so the solder can flow past the lip down the side of the fitting?

415053

[Paul F Franklin]

Make it flush. A properly cleaned and fluxed joint will easily wick the solder into the rest of the joint.

[Bruce Wrenn]

For best results, use LACO brand flux. You will most likely have to go to a plumbing supply house to find it. P-1 Plumbing Licensee holder in a previous lifetime