Fullwood Magnum Milk Filter Service Kit (Spring Type) The Fullwood magnum milk filter service kit (spring type) is a complete replacement seal kit designed to support reliable filtration performance in Fullwood Magnum spring-type milk filters . This kit provides all essential sealing components needed to restore correct function, prevent leakage, and maintain stable vacuum and milk flow during routine parlour operation. Using fresh seals during servicing helps ensure secure, hygienic operation and reduces the risk of unplanned downtime linked to worn or perished components. This service kit includes the drain cap (035565) , main O-rings (188888 and 188886) , and the seal (072734) —the full set of critical wear parts required to refurbish the filter assembly. Replacing these parts as a complete kit promotes accurate fitment , reliable sealing , and consistent milk filtration , avoiding problems associated with reusing old or misshapen components. Milk filters experience constant vacuum changes, temperature variation, and exposure to detergents. Over time, this can weaken seals and cause vacuum fluctuation or milk loss. Installing a new Fullwood magnum milk filter service kit (spring