Ask This Old House - Season 4 Episode 22
Cast-Iron Radiator and Bathtub; Grading; Wobbly Newel Post

Up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin OConnor how to repair damaged threads on a radiator using a drill and "tap." Then, landscaping contractor Roger Cook helps a homeowner solve a grading problem that is causing wood rot on the side of her house. Then Richard and Kevin, along with general contractor Tom Silva and host Kevin OConnor ask, "What is it?" Afterward, Tom shows Kevin how to stabilize a wobbly newel post. Then, Kevin and a tub refinisher help a homeowner refinish her old cast-iron bathtub and make it look like new.