Single mouth assay faucet:  In order to PH & rusty resistance is processed with Epoxy coating on copper surface.  It can be turned at 360°, the switch valve is made of ceramic that can avoid acid and wear.  The outlet produced in PVC, has detachable hose nozzles, function of allaying pressure, changeable high-pressure outlet construct or normal clean outlet control of water flow faucet immediately.  Using knob switch.