A great deal of heat can be lost between a home's boiler and its living spaces. If you have a warm basement, pipe insulation will help reduce your heating costs by keeping the heat in your pipes until it arrives at your radiators. Our 1"-thick fiberglass insulation is beefier than that found elsewhere. It has an outer foil jacket and comes in 3-foot lengths in a variety of diameters. You can borrow our pipe gauge to measure and order correctly, as pipe sizes are measured by internal diameter. For steam or hot-water heating systems. Prices are per 3-foot length.