What is PSI and GPM?

Q:  Water pressure is measured in pounds per square inch–also known as psi. It is commonly referred to as “pressure”. Water pressure varies from home to home and it is important to know what your pressure is when buying new sprinklers.

Flow rate is measured in gallons per minute–known as gpm. Your flow rate is how quickly water–flows from your spigot or pump through the hose and to your sprinkler.

A: What is PSI and GPM?