supplied to faucet 10 at water inlet 18 which typically includes a threaded or sweated connection for attachment of water supply tubing or piping not shown flow through faucet 10 from water inlet 18 to faucet outlet 13 is controlled by solenoid operated valve 20 which is typically activated by an optical or infrared sensor 15 for sensing the presence of a user of the faucet 10 a water inlet housing 22 is located downstream of water inlet 18 and upstream of solenoid operated valve 20 this housing 22 is depicted on fig2 and 3 and typically comprises a central bore 24 therein which is in fluid communication with water entering the faucet 10 through inlet 18 the water entering through inlet 18 passes through bore 24 of the housing 22 and exits through water outlet port 19 water passing through outlet port 19 then enters solenoid 20 where its further passage through faucet 10 to water outlet 13 is controlled by solenoid valve 20 one end of the bore 24 of water inlet housing 22 typically contains a threaded end closure 28 mating threads 26 in the housing 22 allow ready removal and replacement of closure 28 the removal and replacement of closure 28 is necessary to accommodate the placement of an inlet screen or filter 30 within bore 24 of water inlet housing 22 to collect particulate matter.