G Grizzly Backflow & Plumbing
Bethesda, MD · 20814 Local testers · Utility reports filed

PVB Testing in Bethesda, MD Near Me

PVB (pressure vacuum breaker) testing in Bethesda, MD for lawn sprinklers and irrigation lines. Call (833) 990-5874.

Call (833) 990-5874 More services
PVB Testing in Bethesda, MD
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(833) 990-5874
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RPZ, DCVA and PVB
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PVB Testing in Bethesda, MD

The pressure vacuum breaker, or PVB, is the brass device sticking out of the ground near your sprinkler system with a bonnet on top and two small test cocks. It is the most common backflow preventer on residential irrigation.

A PVB test checks two things. The air inlet has to open when pressure in the body drops to about 1.0 psi. The check valve has to hold at least 1.0 psid in the direction of flow.

The usual failures are a cracked bonnet from a freeze, a stuck poppet, or a check that leaks because the rubber has gone hard after years in the sun. Water spitting out from under the canopy when the system starts is a sign the poppet is not seating.

A PVB must sit at least 12 inches above the highest sprinkler head it serves. If yours is lower, it may not pass inspection even with good readings.

Grizzly Backflow & Plumbing connects Bethesda, MD homeowners with testers for PVB testing and backflow prevention repairs. Call (833) 990-5874.

How it works

Four steps to backflow testing in Bethesda, 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 Bethesda, MD

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

Neighborhoods we cover for backflow testing

  • Downtown Bethesda
  • Bethesda Chevy Chase
  • Edgemoor
  • Glen Echo

ZIP codes we serve

20814 20816 20817 20889 20892 20894

Backflow testing FAQs

Questions about backflow testing

Questions we hear most often about PVB Testing in Bethesda, MD.

Talk to a person
Who is allowed to test my backflow device?
A tester who holds a backflow tester certification recognized by your state or your water utility. Many utilities keep an approved tester list and reject reports signed by anyone not on it.
What is the difference between an RPZ and a double check valve?
Both have two independent check valves. An RPZ adds a relief valve between the checks that discharges water to atmosphere if the checks leak, which is why it is required on high-hazard connections.
Why is water dripping from my RPZ relief valve?
A steady drip usually means debris is holding the first check open or the relief valve diaphragm is worn. A cleaning or a rebuild kit fixes most cases.
How long does a backflow test take?
A residential PVB or double check test usually takes 20 to 30 minutes. Large commercial and fire line assemblies take longer.
Can a backflow preventer freeze?
Yes. Trapped water expands and can crack the bronze body or blow out the bonnet. Insulated enclosures, heat cable or draining the device for winter prevent it.

Book a backflow test

Backflow Test Due in Bethesda, MD? Call now.

Certified testers for backflow testing in Bethesda, 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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