Guide to Draining Your Sprinkler System

As the colder months approach, it’s crucial to prepare your sprinkler system to prevent damage caused by freezing water. Draining your sprinkler system is a key maintenance task that ensures its longevity and efficiency. Here’s a comprehensive guide on how to properly drain your sprinkler system.

The first step in draining your sprinkler system is to shut off the water supply. Locate the main valve that controls water flow to your sprinklers and turn it off. This valve is typically found near your water meter or in the basement. Shutting off the water supply prevents additional water from entering the system during the draining process, which is essential to ensure that no residual water remains in the pipes to freeze and cause damage.

If your sprinkler system is automated, make sure to turn off the timer or controller. This prevents the system from attempting to run during the draining process. Modern systems often have a “rain” or “off” mode, which can be used to disable the automatic scheduling temporarily. Turning off the timer protects the system’s electronic components and ensures that no water is inadvertently pumped into the lines while you’re trying to drain them.

There are three primary methods to drain your sprinkler system: manual drain valves, automatic drain valves, and the blowout method. For manual systems, open the drain valves at the lowest points of the system and allow the water to escape. If your system uses automatic drain valves, they will open and drain water when the pressure drops below a certain level. The blowout method involves using an air compressor to force water out of the sprinkler lines, which is highly effective but requires caution to avoid damaging the system with too much air pressure.

After draining the system, inspect all components, including valves, pipes, and sprinkler heads, for any signs of damage or wear. This is the ideal time to perform any necessary repairs or replacements. Once everything is drained and checked, leave all drain valves open over the winter to prevent any trapped water from freezing and expanding. Cover any above-ground components, like backflow preventers and exposed pipes, with insulation or protective covers to shield them from freezing temperatures.

Properly draining your sprinkler system is essential for maintaining its efficiency and avoiding costly repairs. By following these steps, you can ensure that your system is ready to withstand the winter and be in perfect working order when spring arrives. Taking the time to winterize your sprinklers not only extends their lifespan but also gives you peace of mind during the colder months.