The most common fire hydrant outlet in the USA is 2 1/2 inches with NH / NST threads
Equivalent part number - HA1515
Equivalent part number - HA25NYFD20T
Rubber liner is thinner than the 15D850 for lighter weight and flatter packing
Equivalent part number - FM25NYFD15T
Thread Sealant Paste Color_White The most common fire hydrantPipe thread sealants are a non setting, multi purpose compound which contains PTFE, plus synthetic fibers to create a stronger seal. Recommended for use on threaded galvanized steel, iron, brass, copper, aluminum, stainless steel, polyethylene, fiberglass reinforced, PVC, CPVC and ABS pipe. For use in systems maintaining temperatures between 300 F and 500 F ( 184 C and 260 C) and pressures up to 10,000 PSI. Available in 1 4 Pint. WARNING: This product