Connect New Supply Line to Angle Stop and Final Tightening

What happens here

After hand-tightening the faucet connection, hand-tighten the compression end (typically the 3/8" COMP side) of the new supply line to the angle stop valve. Once hand-tight, use an adjustable wrench to turn the nut an additional 1 to 1.5 full turns. The video narrator mentions that many product labels recommend 'hand tight plus 1/4 turn with a wrench' to avoid overtightening and damaging the internal washer, which can lead to leaks or premature failure. Be mindful not to overtighten, as this was the likely cause of the cracked nut on the old supply line.

Goal: Hand-tighten the compression end of the new supply line to the angle stop valve, then use a wrench to tighten an additional 1 to 1.5 turns, being careful not to overtighten.