1) Pumped irrigation systems are more complex.  Professional design and installation is recommended. 2) If you require a fully automatic irrigation system with the sense to turn itself off when it's raining you can install a rain sensor (EC, SRC & ICC only). 3) A controller will turn on a pump unit at an appointed time, then sequentially open each of the solenoid valves for a pre-designated period. 4) Once constructed the solenoid manifold can be mounted VERTICALLY e.g. on a wall.  OR HORIZONTALLY e.g. buried in the ground. 5) Water supply into the tank.