A water-blocking airbag (also known as a pipe sealing airbag, water-closing plug, or inflatable pipe plug) is an inflatable sealing tool made of high-strength rubber and fiber fabric composite. By inflating, the airbag expands to fit tightly against the inner wall of the pipe, using friction and elasticity to form a temporary sealing barrier and quickly stop water flow. It is an ideal tool for underground pipeline drainage, sludge treatment, and …