close menu
This website uses cookies to store your accessibility preferences. No personal / identifying information is stored. More info.

Operating Guidelines


Vacuum System Operating Guidelines
DO control excessive water discharge from your home to the vacuum system. Your vacuum manhole/valve may be shared by as many as four connections. Water output from multiple fixtures can exceed the capacity and cause a sewage back-up. Controlling excessive discharge from your home will reduce the potential for sewage back-ups..
DO call MLWSA at 877-806-3741 if your fixture traps are dried out, if you are experiencing odors from your drains, or if you hear constant air movement at/near a house drain, system air vent or vacuum pit.
DO ensure the grade around your vacuum pit slopes away from the pit.
DO be aware that maintenance of the plumbing from the home/business to the vacuum pit is the responsibility of the property owner.

DO NOT introduce the following materials into your vacuum pit: 
Kitchen related – grease and seafood shells.
Bathroom – dental floss, large amounts of hair, sanitary napkins, tampons/applicators, condoms, baby or adult wipes, disposable or cloth diapers, orthodontic or other rubber bands.
Miscellaneous. Household - elastic, “Swiffer” type cloths, glass, rope/string, cat litter, aquarium gravel, or other abrasives.
Construction related – sand, steel wool, metal or wood shavings, lapping compound, sawdust, screws/staples/nails, drywall compound, dust from drywall installation, grout, rags or paint (latex and/or acrylic).
Chemicals – liquid drain cleaners, dark room chemicals, explosives, gasoline or other flammable/combustible materials.
DO NOT attempt to make vacuum system repairs yourself.
DO NOT attempt connecting to a vacuum sewer without the proper approvals and permits.
DO NOT excavate (by hand or machine) near the vacuum pit before underground utilities are located and marked. Phone MISS DIG at 811 or 1-800-482-7171, at least 72 hours in advance of any digging.
DO NOT connect water softeners, downspouts, sump pumps or storm drains to the vacuum pit, or allow any other surface water to get into the vacuum pit.
DO NOT drive on the vacuum pit cover. You will damage your vacuum pit accessway.