First, turn off the main water supply to the house, which is often found near your water meter. If your sprinkler has manual drain valves, also shut off the valves on the backflow preventer.

Keep in mind that if you need to locate your house's main water shutoff valve to turn off your ceiling sprinklers, you will ...

Despite a warm forecast, most experts advise waiting until mid-May to activate sprinkler systems. Here's what the last-freeze ...