Overview: Up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor how to replace all the parts inside a typical toilet tank. Next, landscape contractor Roger Cook and Kevin head outside for a look at different types of above-ground sprinklers and some basic tips on watering a lawn. Finally, back in the loft, Tom shows Kevin how to build a very simple but elegant bookcase using plywood and portable power tools.