Installing Underground Sprinklers

the property is still there from before it is H2O town

You'll need a pump for water pressure and a timer to turn on and off. Hooking the system in your sprinkler system and go.

what I did was to use an existing external valve, a valve timing and which had a hose in the garden, buried in trenches dug LTD that the sprinkler heads. It was my way-other than to leave someone would cost a fortune

It depends if you still have a well pump, expansion tank and all controls. If you do that you can plug in by the expansion tank. Otherwise it may be cheaper to just use tap water.

Most irrigation timers an option to use a pump relay to start the pump. If the pump is operational, you should be able to connect.