G Grizzly Backflow & Plumbing
Baltimore, MD · 21201 Local testers · Utility reports filed

RPZ Valve Testing in Baltimore, MD Near Me

RPZ (reduced pressure zone) valve testing in Baltimore, MD for high-hazard water connections. Relief valve and both checks tested. Call (833) 990-5874.

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RPZ Valve Testing in Baltimore, MD
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(833) 990-5874
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Reports filed with your utility
RPZ, DCVA and PVB
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RPZ Valve Testing in Baltimore, MD

An RPZ, or reduced pressure zone assembly, protects the public water main from high-hazard connections: boiler feeds, chemical injection, car washes, medical and dental offices, and irrigation with fertilizer injection.

The test has three parts. First the tester checks that the relief valve opens at 2.0 psid or more. Then the first check is read, and it usually holds a differential of 5 psid or higher. Last, the second check is tested for tightness against backpressure.

A dripping relief port is the classic RPZ complaint. Most of the time a pebble or scale from a recent main break is holding the first check open. Sometimes the relief diaphragm itself has torn.

RPZ assemblies must sit above grade with open air under the relief port. One buried in a pit can flood and siphon dirty water back, which is why most codes forbid it.

Grizzly Backflow & Plumbing connects Baltimore, MD property owners with testers who handle RPZ valve testing and backflow prevention paperwork for brands like Watts, Febco, Wilkins and Ames. Call (833) 990-5874.

How it works

Four steps to backflow testing in Baltimore, MD

  1. 01

    Grab your notice

    Have the utility letter handy. It lists the device, serial number and due date.

  2. 02

    Talk it through

    Call (833) 990-5874. We go over the device type and the price before anything is booked.

  3. 03

    Test day

    A certified tester reads each check and the relief valve on a calibrated gauge.

  4. 04

    Report filed

    The report goes to your water utility, and you keep a copy for your records.

Coverage

Backflow Testing Services Across Baltimore, MD

Backflow testing for the neighborhoods and ZIP codes around Baltimore, MD.

Neighborhoods we cover for backflow testing

  • Fells Point
  • Canton
  • Federal Hill
  • Mount Vernon
  • Hampden
  • Charles Village
  • Patterson Park
  • Locust Point
  • Bolton Hill
  • Reservoir Hill

ZIP codes we serve

21201 21202 21205 21206 21209 21210 21211 21212 21213 21214 21215 21216 21217 21218 21223 21224 21229 21230 21231 21233 21239 21240 21250 21251 21287

Backflow testing FAQs

Questions about backflow testing

Questions we hear most often about RPZ Valve Testing in Baltimore, MD.

Talk to a person
Does my lawn sprinkler system in Baltimore, MD need a backflow preventer?
Almost every US plumbing code requires one on irrigation, since fertilizer, pesticide and standing water at the heads can siphon back. The device type depends on local code and how the system is laid out.
Do I need an expansion tank after installing a backflow preventer?
Often, yes. The device makes your plumbing a closed system, so heated water cannot expand back to the main and the water heater relief valve may start dripping.
What is a cross-connection?
Any point where drinking water piping can come into contact with a non-potable source. Common examples are a hose in a bucket, a boiler fill line and an irrigation system.
Who sends the test report to the water utility?
The tester usually files it, either on the utility's paper form or through its online portal. Ask for a copy for your own records.
Can a backflow preventer be repaired instead of replaced?
Often it can. Rebuild kits with new discs, springs and seals are sold for most brands. Replacement makes more sense when the body is cracked or parts are no longer made.

Book a backflow test

Backflow Test Due in Baltimore, MD? Call now.

Certified testers for backflow testing in Baltimore, MD. Call (833) 990-5874 and we go through the device and the price before anything is booked.

(833) 990-5874
Phone · (833) 990-5874
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