We fertilized and aerated and overseeded the lawn last fall. We put a sprinkler system in the yard almost 20 years ago and they asked me about what we could do to enable them to water the garden they planted on the other side of a dry creek bed and we installed a quick Coupler that gave them ability to water with a garden hose the plantings in the garden. We used a very large valve box that enabled a flex hose of 100 foot to be hidden out of site inside the Valve Box and has a connection for the garden hose that is attached and can be turned on when they desire it to be on. .I used schedule 40 pipe and fittings and installed a drain to winterize the system.
They have used it a lot this summer and are very happy!