NIPPLE KIT for Krontec RFC-88 and RFC-89 series refuelling systems used as a valve to drain BOTH fuel and vent lines from the RFC-88-K and RFC-89-K couplers when used on pitstop rigs or bottles. In this case, this part is fitted to a dump churn made by the customer and comes with parts as per the images 1 x RFCNIPPLEWELDRING and 1 x RFCWELDNIPRINGORING, 1 x RFC-88-N and 6 x mounting screws to facilitate the correct fitment.This product is a spare part for the Krontec Refuelling RFC System.