What is suction?

suction cup tool

Glossary “suction cup tool” Definition:
A large synthetic rubber cup for sticking onto parts. They are often used to hold window glass when holding or moving the glass, or also to pop-out large surface area dents in panels.

suction line

Glossary “suction line” Definition:
1). The line connecting the evaporator outlet to the compressor inlet. 2). A low-pressure line in a system usually used as a return line.