Fullwood Diaphragm vent valve service kit 5/8″ This service kit is specifically designed for Fullwood diaphragm vent valves with 5/8″ ports, providing all the key replacement diaphragms, seals, and O-rings needed to refurbish the valve and restore proper operation in dairy vacuum circuits. Vent valves regulate air entry and vacuum balance in milking systems. When diaphragms and seals wear, the valve can stick, leak, or respond slowly — leading to uneven vacuum, pulsation issues, or milking interruptions. Replacing these soft parts as part of routine servicing helps maintain stable vacuum control, smooth parlour performance, and reduced stress on associated equipment. The components in this kit are manufactured to the correct sizes for 5/8″ Fullwood vent valves, ensuring accurate fit and reliable sealing. Installation can be completed by engineers or competent farm staff as part of scheduled maintenance or repair work. Supported by Mill Dairy Service’s on-farm engineering experience, this Fullwood diaphragm vent valve service kit offers a cost-effective way to keep your vacuum control valves working as intended and minimise downtime during busy milking periods. Key Features Service