Broken sprinkler heads are bad, ... Wood likes the Rachio controller because its plug and play technology integrates easily with existing irrigation systems ($200, rachio.com).

Central Sprinkler Co., of Lansdale, Pa., discovered some of its sprinkler heads have O-ring seals that can corrode, said L. Dennis Kozlowski, ... An O-ring seal keeps the plug from leaking.

1/4-in. x 1/4-in. Male to Male Industrial Plug quick coupler ($1.41). ... Once charged, open the valve and blow out each zone ...