Valves are an essential part of any sprinkler system.
Most automatic sprinkler systems are set up with two types of valves. It is recommended that all systems be equipped with a shutoff valve installed in a box for easy access. Each zone valve is piped to a set of sprinklers. When the valve is turned on, either by hand or in response to an electronic signal from the timer, all the sprinklers piped to that particular valve go on. Each sprinkler uses a certain number of gallons per minute of water.