Backflow Testing in Bethesda, MD

When you call

Your call is routed to an independent plumber who works in Bethesda. Plumber Washington DC Pros is a referral line, not a plumbing company, so the plumber quotes and schedules the job with you directly. It helps to say whether the device is on a house, a condominium or a commercial building, what it feeds and whether it is leaking right now. If water is running, close the sprinkler valve first. Ask the plumber up front whether they are registered with WSSC Water and hold a cross-connection technician certification; WSSC accepts tests only from plumbers with both.

Things that change the cost

• Number of assemblies. A single sprinkler device is one test; a building with a fire line and domestic protection may have several.
• Repairs found. Rebuild kits, a new relief valve or a replacement body add to a passing test.
• Size and type. Larger and reduced pressure assemblies take longer to test and rebuild.
• Setting. A device in a parking garage, a crowded mechanical room or a landscaped bed can take extra time to reach.
• Permit. Replacing or relocating an assembly brings in WSSC permit work.

Local conditions in Bethesda

WSSC Water supplies water and sewer across Bethesda, and its Plumbing and Fuel Gas Code calls for a yearly test on every installed testable backflow prevention assembly, along with irrigation pressure vacuum breakers, RPZs and some fire sprinkler assemblies. The Montgomery County cross-connection line is 301-206-7932.

The housing stock leans old. In the 20817 ZIP, roughly two-thirds of homes predate 1980 and the 1950s were the biggest building decade. Plenty of those houses had irrigation added years after they were built, sometimes with a device placed wherever was convenient. A plumber may suggest moving an assembly that sits in a spot that floods or freezes. WSSC's tap water analysis lists hardness averaging 140 mg/L from the Potomac plant, and mineral buildup on check seats is one reason an older device stops sealing.

Before the visit

• Know where the irrigation shutoff and the main shutoff are
• Have any WSSC notice and past reports ready
• Trim plants away from the device
• Tell building management or neighbors if water will be off briefly