An inflatable ring with a central membrane, for air testing drainage pipes to a standard air test of 100mm of water over air. Light and easily transportable. They can be passed swiftly through restricted openings when collapsed. Each stopper is designed to fit exact pipe size and is suitable for one size pipe only. Inflation is either by hand pump or compressor and adapter, fitted with a pressure regulator to avoid over-inflation.
STANDARD STOPPERS available for the following pipe sizes (mm)
•300 •350 •375 •400 •450
•500 •525 •550 •600 •650
•675 •700 •725 •750 •800
•825 •900 •975 •1000 •1050
•1125 •1200 •1350 •1500 •1650
•1700 •1800
Special stoppers can be made upon request.