A Standard Fire Hydrant is typically used in urban areas, but may be found in rural areas with a private Water Mutual company. Standard Hydrants are supplied by a pressurized pipe network, and have two 2-1/2 inch outlets and one 4 or 4-1/2 inch “pumper” outlet. The minimum pipe diameter feeding a Standard Hydrant is 6 inches. A Wharf Hydrant is used for primarily residential applications in rural areas where the source of water is a well for an individual or shared well and its water is stored in aboveground tanks maintained by the property owner. The minimum pipe diameter for a Wharf Hydrant is 4 inches. A Wharf Hydrant has only one 2-1/2 inch outlet, and needs to provide only pressure from elevation or head pressure (pressure provided by the weight of the water in the tank) sufficient for positive flow at the outlet. Click on the Related Link below to view pictures of both hydrants on our Land Development website.