J/B Industries J/B Part# PR-5FF Tee# T3-6C Reducer# W3-63 J.B. Industries Vacuum Pump INTAKE BRASS TEE Base threads are 3/8″ Male Pipe Thread (this is the part that screws into the pump). The tee has two hose connection sizes; 1/4″ & 3/8″ Male Flare with Brass Caps Note: The side connection on the tee is 1/4″ male flare as pictured, if the reducer is removed you will have Two 3/8″ male flare ports so this tee actually gives you three options, or you can put the reducer on the top port as well.