Several types of residential water filters and selecting a drought-resistant tree.

Plumbing and heating expert Richard Trethewey helps a homeowner improve the quality of her drinking water by installing an under-sink filter. Richard and host Kevin O'Connor are then joined in the loft by water filtration expert Bill McTighe, who explains several other types of residential water filters. Off on a HOUSE call, landscape contractor Roger Cook advises a homeowner in selecting a drought-resistant tree and gives her a hand planting it properly in her sloped front yard.