Timers mount to the wiring of the circulating pump and provide programmable controls to adjust the time-of-day and duration that a circulating pump operates. The timer helps save energy by only running the pump during periods of demand on the system. They can be used in conjunction with an aquastat which starts and stops the pump to maintain a stable water temperature.

Aquastats mount to the surface of a pipe to sense the pipe's temperature and send on or off signals to the circulating pump. They are typically used in potable water systems to control the temperature of water that's delivered to faucets and shower heads.