Hydro-Rain Solenoids are the ones you can install and forget because they work flawlessly year after. We build them with durable glass-filled nylon to ensure toughness, reliability, and long-lasting performance. Hydro-Rains lineup of solenoids, and solenoid adapters allow you to replace most brands of solenoids. Some compatible brands are: Hydro-Rain, Irritrol, K rain, Orbit, Rain Bird, and Toro.