Blockage in the flow of liquid, esp. on the suction side of a pump caused by an air bubble in the line.

A pocket of air that blocks the normal flow of liquid in a system

Blockage liquid flow of liquid (i.e. on suction side of pump) caused by an air bubble in the line.

Results when air bubbles form in the plumbing, usually during draining and refilling. Ask your dealer for the best remedy based on your brand.

An air lock is a bubble of air which restricts the flow of water in a pipe.

An air lock is gas trapped in a high point of a liquid-filled pipe system. The gas, being lighter than the liquid, rises to the highest point and restricts the flow of liquid. In very tall systems, the gas can prevent flow entirely.