Kit  Smart Timer Fully automatic +4 Automatic Valves.
 
That kit will allowed you to control your irrigation, reduce your water consumption and your bills.
The valves will be use to control 4 zones so finish the problems of pressure, the Smart timer will open zone by zone to keep a pressure balance in your system.
 
Smart controller, 
using advanced water conservation technology and regulating irrigation run times based on locally measured weather. Installation and maintenance are simple, accessible through the optional Smart Port.
Control up to 4 stations with 3 programs and 4 start times each.
Solar Sync sensor compatible for automatic daily weather-based adjustments. 
Day schedule: 7-day calendar or true odd/even programming with 365-day calendar clock.
Easy Retrieve memory: original program saved in permanent memory and retrieved at any time. Seasonal adjust: 0% to 150%. 
Programmable sensor input by station.
Programmable rain delay from 1 to 7 days. Programmable delay between stations.
Rain sensor bypass switch.
One button manual start and advance.
Programmable event day off allows specific day(s) to be designated as always "off".
Electronic short circuit detection 3 V lithium battery (included) for remote programming and timekeeping, not required for program backup.
 
Valves are controlled with 24V only so it is safe in your garden.