The GASAV-R automatic shut-off valve carries a 90 day warranty from date of purchase that the product will be free from defects in material and workmanship under normal use and service. The unit will not be covered should the installation and operation instructions have not been followed. Typical failures not accepted under warranty are units showing any sign of melting from installation too close to high heat and damage to the knob or unit itself from turning the knob in a counterclockwise direction.