English to French Other Engineering (general) taps

THIS IS a powerpoint presentation of a food supplement (meal replacement) that the workers in the company prepare themselves by mixing it with water, using a self-help tap system.

The product is mixed in refrigerated stainless-steel tanks with motorised stirrer.
It is freshly prepared for each shift.
It is dispensed cold, through a SELF-HELP TAP system into a 1 litre plastic bottle with cap.

I can visualise the tap system, but am not sure how to translate this term: "le produit est dispensé à froid au moyen d'un système à ROBINETS EN LIBRE-SERVICE ?

this sounds ridiculous to me, I am sure there must be a better translation, and would appreciate your help.