Pop-out sprinkler with vacuum actuated push-back

A method of controlling a sprinkler system with a controller, wherein:

• the sprinkler system includes:
• a shutoff valve;
• a sprinkler head downstream of the shutoff valve;
• a vacuum pump downstream of the sprinkler head;
• and
• a drain downstream of the vacuum pump,
• wherein:
• the controller is operationally coupled to the vacuum pump;
• the sprinkler head is in a deployed position when the sprinkler system is pressurized, and the sprinkler head is in a retracted position when the vacuum pump is engaged;
• and
• the method comprises the controller:
• rendering a first determination, when the sprinkler system is in a pressurized mode, to transition the sprinkler system to a standby mode, and
• executing a first communication with the vacuum pump based on the first determination, the first communication directing the vacuum pump to activate, whereby fluid is drained from the sprinkler system into the drain.