3/4 to 1/2 adapter has smooth surface, clear threads, the overall thickening of the pipe wall treatment, pressure resistance and explosion-proof ability. it can served as pipe extension connector, and also widely used in gas, oil, fuels, grease, LP, natural gas, refrigeration, instrumentation and hydraulic systems in low and medium pressure pipe line connections. ⚙️WIDELY APPLICATIN: Used to connect female pipe fittings with different diameters, or extending the pipe length. Gadoutcover NPT Brass Nipple Reducing Nipple Reducing The brass nipples are built to withstand various plumbing applications, making it the perfect choice. Such as gas-liquid transportation, equipment piping, pump valve connection, chemical, petroleum, natural gas, instrumentation, daily household pipeline. Apply to plumbing connections, compressed air, hydraulic, refrigeration, instrumentation, gas. standard NPT taper threads allow the brass pipe fittings better mesh with the object, strengthen the fixation to prevent leakage. It's hard connect way and in most cases do not require sealant . Adapter Nipple 3/4" Male x 1 Female Pipe Fitting NPT - Brass Adapter This LTWFITTING Pipe fitting is made of brass for durable. It has female NPT threads for connecting to male threaded pipes. Primary uses water, gasoline... A/C Compressor-New UAC CO4440C 3/4 To 1/2 Reducer 4PCS Solid Brass Reducing Hex Nipple Adapter Set - 3/4" NPT Male To 1/2" NPT Male Pipe Fittings For Plumbing, Fuel Lines, And Pneumatic Systems Female To Female Hose Adapter Gadoutcover 2pcs NPT Brass Nipple, Adapter Fitting Reducing Solid Hex Brass Nipple, Male to Male Reducer Pipe Fittings Hex brass nipples for easy tightening and loosening. The threads are smoother, the installation is easier and faster. ⚙️NPT TAPER THREAD: The U.S. Please look the size chart for the specific thread diameter. Tip: NPT thread has a 60° taper, so usually unable to screw the thread to the end.