GARDENA 2781-U L' Piece 25mm x 3/4" male threads -Sprinkler System Pro Permanently installed underground and connected via a pipe system the units pop-up when it is time to water your garden and distribute precious water exactly where it is needed. When their work is done, they disappear again back into the ground Install a GARDENA Watering Control your irrigation system and water your garden automatically, even in your absence. Durable - easy - comfortable Tired of watering your lawn by hand - its time to start thinking about a sprinkler system. irrigation. The pop-up sprinklers