Foam high-pressure cleaning gun is a portable cleaning equipment, usually used in conjunction with a high-pressure cleaner. It utilizes a high-pressure stream of water generated by the washer to mix cleaning agents and air to form a thick foam. The foam penetrates the dirt on the body, floor or other surfaces and helps to clean them thoroughly.

A spray gun with a large capacity foam bottle is often referred to as a foam cannon or foam gun. It is a tool specifically designed for car washing that produces a rich foam that helps to remove dirt and stains from the body of the car.

A pressure washer adapter is an important accessory for connecting different hoses and nozzles and other accessories, providing greater flexibility and convenience for pressure washers.