Milton ® (209BK) 1/4"" NPT Rubber Filler Spout Faucet This 1/4" FNPT filler faucet provides easy operation and smooth flow, providing a long spout and lever control. These filler faucets are heavy duty, ruggedly built with stainless steel springs. Made up of a zinc alloy body and a 4" nitrile rubber filler spout, this faucet offers 30 to 35 PSI.