Another type of Plug
that can be used are mechanical Plug and metal
Mechanical Plugs, without the need for air, can block pipes with a diameter of 50 to 150 mm just by tightening a nut
With the help of its metal parts, with only a little bit of wind (available with a small air compressor) and only 10 cm in length, nuclear metal can easily block pipes with a diameter of 200 to 600 mm