Selvo / Revo Beer Pipeline Cleaner J001 5L (2 Pack) SeldenSelvo Revo Beer Pipeline Cleaner J001 5L (2 Pack) Selden Selvo is a powerful quick acting beer line and pump cleaning agent, that will freshen and clean pipes by soaking alone. Selvo is easy to use, simply mix up a solution at 1 part Selvo to 80 parts water and draw through the pipes and dispensing equipment, leave for thirty minutes then thoroughly flush with cold water. Suitable for pressurized systems, hand pumped systems, tanks and other beer