Backflow Testing in Kensington, MD

Which devices in Kensington need a yearly test?

WSSC Water's cross-connection program covers any testable backflow prevention assembly on its system. In Kensington homes, that most often means the device on an in-ground lawn sprinkler system, but WSSC also names fire sprinkler systems and some pools. Hose bibb vacuum breakers and dual checks are not testable, though they still wear out. The town's median home dates to about 1959, so many houses have no testable assembly at all unless irrigation or a pool was added later.

How do the results reach WSSC?

The test itself has to be done by a technician holding WSSC's cross-connection certification. Afterward, a registered principal master plumber submits the field test report to WSSC electronically, so as the homeowner you don't mail anything in. WSSC sends reminder letters to customers whose assemblies are on file. If a letter arrives, book soon after so there is time for a repair and a retest if the device fails. Keep your own copy of each passing report; buyers of older Kensington homes sometimes ask for it.

Does the Town of Kensington get involved?

For the plumbing itself, no. WSSC Water Permit Services issues plumbing permits, including for a new or replacement backflow assembly, through its ePermitting system. The Town has its own forms for home construction projects, fences and signs, so if the device is part of a larger landscape or addition project, call Town Hall at 301-949-2424 to ask what it needs. Note that the 20895 mailing area is much bigger than the town itself; addresses outside the town limits deal with Montgomery County for building permits rather than the Town.

One local note

Much of Kensington's southern core is a Victorian-era planned layout listed as the Kensington Historic District, with mature trees and tight side yards. Those conditions make device placement a real question when irrigation is added: a spot that is easy to reach for the yearly test, shielded from frost and out of the way of roots makes every future visit simpler. Ask the plumber to keep the test cocks reachable and leave enough clearance to swap the device later without cutting into a walkway or wall.