How do they water Astro Turf?

Answer 1

It's clear enough that Astro Turf doesn't need water the same way that living grass does, but it does need to be cleaned from time to time. It is designed for rain to be absorbed by the infill material in very much the way that rain would be absorbed by a natural lawn. For turf that is not exposed to rain, water can be sprinkled on to clean the surface. See link for more.