By Pass Valve for Clack WS1 and WS1.25 Valve Bodies and other "brands" that use the Clack type of valve under their private label.PN V3006 or C-BYPASSReference Page 33 of this manual for By Pass "operation" guide,http://www.clackcorp.com/downloads/control_valve_manuals/V3115-99_WS1_1.25_Drawings_and_Service_Manual.pdf
