How many Bluetooth® Tap Timers can I run with the Holman Water app? Matt W 06 March 2020 00:55 Updated Follow Holman Water will only control the Bluetooth® Tap Timer (CO3015) Holman Watercan run up to 8 Tap Timers: Only 1 Tap Timer can run at a time, so they must be programmed so their watering schedules don't overlap Related articles Do I need to be within 20m Bluetooth® range for my Smart Tap Timer to water? Why won't my Smart Tap Timer connect to iGardener™ on my mobile device? Why won't my Tap Timer start watering at my scheduled time? Comments 0 comments Please sign in to leave a comment.