Standard single-size inflatable blocking plugs can be filled to accommodate a pipe with a compatible size.

Standard multi-size inflatable blocking plugs can be filled to accommodate multiple pipe sizes, eliminating the need to store different-sized plugs. 

These single-size blocking plugs thread into a standard test tee where the plugs' rubber bladder inflates to stop the flow. They are used for stack vent testing or plumbing vent testing, and prevent backsplash. These threaded plugs must be matched to a compatible pipe size diameter.

These single-size blocking plugs have a pillow-style inflatable rubber bladder that fits into smaller-sized pipe prior to inflating. They are lighter weight than other blocking plugs and must be matched to a compatible pipe size. They are often used for plugging sewer lines for maintenance and testing.

These multi-size inflatable blocking plugs have a long connection for filling their rubber bladder from a remote location. This expedites the pipe plugging process by avoiding entering confined spaces, such as a manhole. These blocking plugs accommodate multiple pipe sizes, eliminating the need to store different-sized plugs.