public works department

Backflow Brochure


Backflow Brochure

During heavy rain or a blockage in the municipal sewer system, sewage can surcharge or "build up" in pipelines causing sewage to flow backwards into basements.  A backwater valve can help protect your property from back-ups.  A backwater valve is a device installed to prevent sewage from flowing backwards into basement fixtures, such as dishwashers, sinks, showers, toilets, washing machines, or floor drains.

Visiting City Hall

Cambridge City Hall

795 Massachusetts Ave
Cambridge MA, 02139
Ph: 617-349-4000
TTY: 617-349-4242

Hours of Service

Monday: 8:30am-8pm
Tuesday-Thursday: 8:30am-5pm
Friday: 8:30am-12pm

Louis DePasquale
City Manager

Lisa C. Peterson
Deputy City Manager