A diaphragm pump is a type of pump that uses a flexible diaphragm to generate the pressure needed for spraying. This type of pump is very effective in low to medium pressure applications, making it ideal for smaller or medium sized gardens. The diaphragm pump is known for its long life and ability to handle even chemical or viscous sprays without damaging the mechanism. Diaphragm pumps are commonly used in garden sprinkler systems where ease of operation and minimal maintenance are required.