Model 25 Top Check Valve – It’s important to keep the check valves in good working condition. This will prevent contamination from blowing back through the pump which will contaminate the lubricated reservoir.
Stainless Steel Double Ball In-Line Check Valve – These valves are normally mounted close to the lube point and help prevent contaminants from blowing back through the oil lines and also hold oil pressure between the lubrication box and the final lube point which helps prevent oil-less startups.