Reusing water from a washing machine; maintaining small gasoline engines

Host Kevin O'Connor and landscape contractor Roger Cook examine ways to save water when irrigating. Meanwhile, plumbing and heating expert Richard Trethewey heads to San Francisco to install an irrigation system that reuses water from a washing machine. Back in the loft, Richard shows Kevin some toilets that are also designed for hand washing. Then, Roger visits an engine repair shop to learn how to maintain small gasoline engines.