VACUUBRAND oil-free, chemical-resistant pumps used in VACUU•LAN networks have a recommended service interval of 15,000 operating hours. Network pumps should be expected to operate many years without service. Should the pumps need service because of misuse (e.g., sucking liquids or particulates into the networks), service on individual pumps is simple, and leaves other vacuum users in a building unaffected during the service operation.