Electronic Digital Water Timer（YL21303）

• Compact internal stacking, very small size.
• Programmable manual watering for up to 360 min.
• Run time can be set at 1-360min.
• Frequency can be set at 1hrs. 2hrs- 3 hrs- 4 hrs- 6 hrs-12hrs. 1-15days.
• Adapted to 3/4° taps.
• 2xAA alkaline batteries required (not included) .

Why Choose the YL-21303?

• Set & Forget: Program start time, watering duration, and frequency once. The timer runs automatically every day.
• Rain Delay: Skip watering when it rains. Choose delay options from 6 hours up to 7 days to save water.
• Tool-Free Install: Standard 3/4" threading fits most outdoor taps. Connects by hand in seconds — no plumber needed.
• Child Lock: Lock the control panel to prevent accidental changes from kids or pets while programs are running.

Product Features

Large Backlit LCD & Intuitive Dial — The clear green-backlit LCD shows current time, start time, watering duration, frequency, battery level, and active icons. A simple rotary dial switches between Set Clock, Start Time, How Long, How Often, Run, Off, and Rain Delay.

Flexible Watering Schedules — From a 1-minute refresh to a 360-minute soak, and from hourly cycles to once every 15 days — adapts to lawns, pots, greenhouses, and vegetable gardens.

Built for Real Outdoor Conditions — Sealed battery compartment and weather-resistant housing. Rain delay avoids over-watering; manual mode adds an extra cycle without changing the saved schedule.

Technical Specifications

How to Program in 4 Steps

• Install Batteries: Open the battery cover on the back, insert 2 × AA alkaline batteries, then close firmly. The LCD lights up for 2 seconds and defaults to 12:00.
• Set the Clock: Turn the dial to SET CLOCK. Use + / – to adjust the current time, then press OK to save.
• Set Schedule: Turn to START TIME, HOW LONG, and HOW OFTEN in turn. Set start time, duration (1–360 min), and frequency (1 hr – 15 days).
• Run & Enjoy: Turn the dial to RUN. Watering starts automatically. Use + for rain delay or manual mode anytime.

Pro Tip: Make sure your watering duration is not longer than your selected frequency, or the program will not run. The frequency period includes the watering time itself.

Frequently Asked Questions

Q: Will this timer fit my outdoor faucet?

A: The YL-21303 has a standard 3/4" inlet thread, fitting most common outdoor garden taps and hose bibs. The outlet is also 3/4" for standard hoses.

Q: How long will the batteries last?

A: A quality pair of AA alkaline batteries typically lasts an entire watering season. A low-battery icon appears on the LCD when replacement is needed.

Q: Can I water manually without changing my schedule?

A: Yes. In RUN mode press the manual button, set 1–360 minutes, and press OK. Your automatic program stays saved.

Q: What does Rain Delay do?

A: It pauses watering for 6, 8, 12 hours or 1–7 days to avoid over-watering after rain. Press + again in RUN mode to cancel.

Q: Is it safe to leave outside?

A: Yes. Designed for outdoor use with a sealed battery compartment. Keep the cover closed firmly and remove batteries if unused long-term.

Q: Why is my program not running?

A: Check that watering duration is not longer than frequency. Confirm the dial is on RUN and batteries are fresh.