To lead the cleaning solution and the sterilizing solution through the same line as the product without permitting the contact therewith by forming a product inlet to be connected to a sanitary product feeding container, a product distributor outlet to be connected to a product distributor, and a cleaning solution inlet to be connected to a cleaning solution feeding container.

One or more independent cleaning solution sources 45, 47, 49, 51 and one or more independent sterilizing solution sources 53, 55, 57, 59 are provided on each of product distributors 35, 37, 39, 41. Product is distributed through interposition or connection between the process line 33 and the product distributors 35, 37, 39, 41 by interfaces 61, 63, 65, 67. At the same time, the process line is connected to the cleaning solution sources 45, 47, 49, 51 and the sterilizing solution sources 53, 55, 57, 59 to connect the solution sources to the product sources 35, 37, 39, 41. A product plant 31 is provided with its own cleaning solution source 69 and a sterilizing solution source 71 to clean and sterilize the process line 33.