Water Saving Toilet; In-Ground Sprinkler System Ask This Old House : Season 7 Episode 21

Plumbing and heating expert Richard Trethewey helps a homeowner install a new "dual flush" water-saving toilet. Then Richard, along with host Kevin O'Connor, landscaping contractor Roger Cook and general contractor Tom Silva ask, "What is it?" Next, Roger and Kevin head outside to install an in-ground sprinkler system that any homeowner can install.