Vacuum plumbing systems are simple and viable alternatives to underground piping that uses the combined energies of vacuum pressure and gravity for the collection, conveyance and disposal of waste through a piping network that can be routed above ground. Vacuum drainage operates on the principal of having a majority of the plumbing system under a continuous vacuum. Hundreds of vacuum drainage systems are in operation around the world and are accepted by most code authorities. Vacuum systems are a viable drainage solution as noted in the latest edition of the IPC and UPC Codes. In addition, many local and state plumbing codes have also accepted vacuum plumbing as an approved alternative for a variety of waste types including condensate, grey water, sanitary waste and grease waste.