Raindrip Automatic Timers Using this drip watering system eliminates the hassle of remembering to water your plants and encourages non-drought resistant plants to continue to flourish during the heat of summer. These watering timers attach onto a garden tap and then onto the drip system hose. The watering frequency can be set from one hour to once a week and the run time from one minute to two hours. Uses two AA batteries (not included). 3 Products Found: £9.95 Twist Dial Water Timer - NO BATTERIES REQUIRED £34.95 Water timer - Analogue electronic water timer - automatic garden watering £44.50 Water timer - Arizin digital water timer - automatic garden watering.   Search time: 0.41