Description Complete Air Injector Timer - 120 and 240VAC / 50-60HZ For Slug Washing of Pipeline Line Milking Systems. Use for 1.5 or 2.0 inch pipeline milking systems • Electric operated rotary valve. • Connects to the intake end of permanent line with 5/8" Nipple plastic tubing. • Dual alternating output for dual circuit lines or parlor use. 4999-1010-530 Bender Part number 1185 Made in USA by Bender Machine Works 8/26