j,

Probably not. I don't know who set up your system but if you have that good of flow and pressure, you should have had only a 2 zone system and a smaller controller. You can make a manifold by removing 8 of the 10 valves to create two zones with one valve each. JMHO Aloha

Providing that the controller can turn on multiple valves at the same time. Do you:

1. have enough pressure to run 5 valves at the same time?
2. have a transformer that can handle 5 solenoids at a time? Each solenoid can draw 250mA to 300mA, you'd need a transformer that is at least 2A rated!