Backflow Device Inspection and Cross Connection Survey

Backflow Design Data Sheet  |  Irrigation Form  |  Cross Connection Brochure   |  Backflow FAQs  |  Backflow Prevention


There are laws that apply to cross connections. The Massachusetts Plumbing Code (248 CMR 2.14) and Massachusetts Drinking Water Regulations (310 CMR 22.22) both require installation of backflow preventers at all cross connections. In addition, backflow preventers at cross connections are to be inspected once a year by a certified backflow preventer inspector. Your local public water supplier is also required by DEP to inspect cross connections twice a year.  Please contact our Department at 508-432-0304 if you have a backflow device that needs testing.

Backflow Prevention Device Inspection

Community drinking water distribution systems, as well as internal facility drinking water systems, are continuously jeopardized by cross connections unless appropriate valves, known as backflow prevention devices, are installed and maintained. As an owner of one or more cross connections you have the responsibility to maintain the system so that drinking water in your facility or the surrounding neighborhood is not contaminated. Serious illness, even deaths, have been caused by “backflow” contamination incidents that could have been prevented.

Backflow Preventer Diagram

Property Survey for Cross Connection

If you are the owner or manager of a property that is being used as a commercial, industrial or institutional facility, you must have your plumbing system surveyed for cross-connections. If your property has NOT been surveyed for cross connections, contact the Harwich Water Department at 508-432-0304 to schedule a cross-connection survey.

Learn More

To learn more about our backflow and cross contamination, please visit the Water Protection section of our website; Backflow Prevention.