Positive Sealing for Small Diameters
Powerstop is a popular and proven expanding stopper in sizes 2”, 21⁄2”, 3”, 31⁄2”, 4”, 5” and 6”. It is used by many gas utilities and water companies. Working pressure 16 bar, tested to 24 bar.

The positive seal provides two distinct advantages:

The rubber seals expand 20mm in range and takes up ovality or build up within the pipeline.

The mechanical special seal allows new sections of pipe to be pressure tested between the stops