Hose timer question
Hi folks. I'm going to be watering my lawn using a National Walking Sprinkler. What I need is a timer to turn the water on early in the morning, (like 4:00), and do NOT shut it off. I'll turn it off when I get up. The water needs to be on from about 4:00 to 9:00 and any timers that I've seen only allow for up to 240 minutes before it shuts off. Can anyone steer me in the right direction?
Thank you, Smurfsdad