A special hot-tapping drill is then bolted to the open end of the ball valve. This drill uses a
high-pressure seal to contain fluid pressure inside the drill chamber as a motor spins the drill bit.
The ball valve is opened, then the drill bit is advanced toward the pipe wall where it cuts a hole
into the pipe. Fluid pressure rushes into the empty chamber of the ball valve and hot-tapping drill
as soon as the pipe wall is breached