Hot Tapping is also known as Wet Tapping. It is an easy method of adding a line or drain to an existing line while it is under pressure. With a Hot Tap Machine, you can place a hot tap sleeve or saddle on the line. You add a valve, test the connection under pressure with a hydrostatic pump. Then you place the hot tap machine onto the value through a water-tight packing gland, open the valve and lower the cutter and retention pilot down until it touches the pipe. You then drill into the pipe manually or with an electric or air driven unit that cuts a hole in the pipe. The retention pilot grabs the cut out “cookie” (coupon) so it doesn’t fall down into the pipe where it could cause a problem down the line. You then retract the cutter and pilot up into the hot tap machine, close the valve and you have completed the hot tap. No shutdown or draining the system is needed.
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