Rain Bird Sprinkler Timer Isa 304 Manual Jun 2026

. Select the station (1–4) and use the arrows to set a duration from 1 minute to 2 hours. Operating Modes : Turn the dial here to begin normal scheduled operation.

The ISA 304 has two operating modes:

If you own a Rain Bird ISA 304 sprinkler timer, you possess one of the most reliable workhorses in residential irrigation history. Known for its rugged simplicity and intuitive electro-mechanical design, the ISA 304 has kept lawns green and water bills low for decades. However, without the proper guidance, programming this device can feel like deciphering an ancient puzzle. rain bird sprinkler timer isa 304 manual

: Turn the dial to Custom Schedule – Starts to set up to three start times per day. without the proper guidance