The Meggitt F250 hydrant coupler is designed to connect to 4-inch hydrants and adaptors manufactured in accordance to API bulletin 1584. Optional outlet configurations allow the use of various types of threads and hose sizes. (Supersedes F203, F230, F240 series hydrant couplers.) At the split line of the elbow and the main body a four-inch TTMA flange configuration allows the unit to have an adapter attached so the unit can be used as a straight connection without the elbow. A separate boss is on the elbow casting which will allow a fuel sampler or pressure tap to be installed. This boss is standard. However, the drilling and tapping are an option.