MK4 NRV Service Kit The MK4 NRV Service Kit is a replacement service kit designed for compatible MK4 non-return valve assemblies used in dairy parlour, wash or liquid handling systems. It provides the key service parts needed to refresh the valve, helping maintain reliable one-way flow and reduce the risk of backflow during operation. Non-return valves are important for keeping liquid or air moving in the correct direction through the system. Over time, internal seals and serviceable components can become worn, hardened, split or affected by regular pressure, heat, chemicals and wash cycles. Replacing worn parts with the MK4 NRV Service Kit helps restore dependable valve function, supporting smoother flow control and reducing avoidable system faults. This kit is useful for farms and service teams carrying out planned maintenance, repairs or fault finding on compatible MK4 NRV assemblies. It is especially helpful where the valve body remains serviceable, but the internal components need replacing to improve sealing and response. Servicing the valve rather than replacing the full assembly can be a cost-effective way to maintain performance. The MK4 NRV Service Kit is a reliable optio
