Since some water pipes are located either outside or in unheated areas where the temperature may occasionally drop below the freezing point of water, any water in the pipework may potentially freeze. When water freezes, it expands due to negative thermal expansion, and this expansion can cause failure of a pipe system in a number of ways. Condensation control and energy savings are also important reasons to think about insulating those pipes now. Frost King’s Pre-Slit Tubular Foam Pipe Insulation is quick and easy to install and comes in several sizes for a good snug fit for 3/8-In. to 1-1/4-In. pipes. 6-Ft. in length and R-value 2.1 makes this the perfect product to help you save money, energy, and your pipes this winter!