Step 4 · Mark the Insertion Depth
To guarantee the pipe is inserted fully into the fitting, you must mark the correct insertion depth. For a 1/2-inch pipe, the typical insertion depth is 15/16 of an inch. You can confirm this by using the manufacturer-provided depth gauge or by holding the pipe next to the fitting and marking where the pipe bottoms out inside. Use a permanent marker to draw a clear line around the circumference of both pipe ends at the measured depth. This line will serve as a visual indicator during installation.