*PLUMBERSSTOCK EXPERT* responded:
Good day! This Champion RK-25C Classic actuator rebuild kit is used for 3/4- and 1-inch Champion actuators prior to 2004, so, probably, it will. The Champion RK-26C rebuild kit is the one used for Classic actuators bought after 2004. If you need a repair kit for the anti-siphon side of your Champion 466 3/4" valve, the Champion RP-RPK-072 is most likely the one that you need. For products not yet listed on PlumbersStock.com (including the Champion BPCH-1), please feel free to contact one of our customer service representatives at 435-868-4020 between 8:00 AM and 7:00 PM MT or through e-mail at firstname.lastname@example.org to get assistance in ordering the product. Thank you for seeking answers from PlumbersStock.com!