Sentry Sprinklers Model PI-6012 is a Vertical Indicator Post that is installed in combination with a buried non-rising stem gate valve to indicate the buried valve opening position. The post sight window indicates whether the valve is in the open or shut position. The post can be field adjusted for the required depth of the buried valve. The Indicator Post is anti-corrosion with 10 mil (250μ) of fusion-bonded epoxy (FBE) coating on both inside & outside. All other components are made of corrosive resistance materials.