How is the sprinkler system hooked up to a water supply? Do you use the exterior hose bibs?

At “8 Days” we generally only use an exterior hose bib as a last resort water source for the sprinkler system.  Reason being, that most existing household hose bigs are ½ inch size in diameter which means a smaller water source to feed the sprinkler system.  The only reason to use an outdoor hose bib as a water source is where there is no access to indoor plumbing (basement fully finished) to bring out a larger water source than ½ inch”.