The curb-stop is a technology for sealing small-diameter pipes that are under pressure. The unique system consists of a specially designed fitting device that is clamped around the pipe. The pipe is sealed by mechanically compressing a rigid rubber cone using the special curb-stop drilling and sealing tool.
The curb-stop can be used on pipe diameters of ¾", 1", 1¼", 1½" and 2". Works just like a normal pipe valve.