Ask This Old House season 4 episode 15
Episode title: In-Ground Sprinkler System; Pouring a Concrete Footing
Landscaping contractor Roger Cook heads to Dallas, Texas to help a homeowner install a low cost in-ground sprinkler system. Then Roger, along with plumbing and heating expert Richard Trethewey, general contractor Tom Silva, and host Kevin O'Connor ask, "What is it?" Then, Tom helps a homeowner pour new concrete footings for a backyard deck.
