Thread 1 : 1/2" NPT Female (7/8" Nominal Thread Diameter) three sided branch T male pipe fittings are reusable and can be used for applications involving pneumatics, vacuum, and general fluid handling. Our brass fittings are an economical and durable solution to your piping and plumbing needs. In addition three way tee mpt fittings are also widely used in industrial manufacturing applications for lubrication, cutting fluid, coolant and oil delivery where impact and corrosion resistance is desired. Additional usage for other types of fluid transfer and handling non potable water, air and fuel.