Step 6 · Assemble Pipe and Fitting
Immediately after applying flux, push the pipe straight into the fitting until it is fully seated against the fitting's internal stop. Give the pipe a quarter-turn twist to spread the flux evenly within the joint. Use a clean rag to wipe off any excess flux that has squeezed out around the seam. This prevents the excess flux from running and burning onto the pipe, which can create a messy appearance and potentially weaken the joint if it draws heat away from the seam.