Lawn sprinkler pump / system

[recom273]

I am slowly setting up an automated garden irrigation system in my new build, so far, even though the house isn't finished I have a "drip" sprinkler under a planted hedge and want to setup a sprinkler system before I lay the lawn but already I can see that there is not enough water pressure and I will need to put a pump somewhere in the build.

 

Could anyone point me in the direction of a good / reliable / cheap pump - Are on demand or constant pressure pumps available here? I saw a small 1KW pump which looks like it could do the job, not too sure where to place it in the system, there are solenoid valves and power supplied to every zone, along with smart relays, so I could in effect set up an automation to switch the pump on at the same time of opening a valve or write a flow to to check if the pump is running before releasing the solenoid. 

 

I would love to see some other small / DIY setups.

[VocalNeal]

Last time I was in Thai Watsadu there was a whole section dedicated to irrigation.