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Napa Valley Backflow Testing & Repair
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Opened a test port on this 6” device and unleashed a full port dump. We took the whole thing apart, piece by piece, and chipped out a ton of mineral deposits that we call barnacles. They grow inside the device and occasionally break off, clogging the sensing line. After thoroughly cleaning both check valves, we cleaned the relief valve assembly and finally got it to pressurize properly.
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11/13/17
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Sometimes the backflow preventers are in curious places. Testing at B.V. Vineyards.
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See this? This is bad. A rubber disc presses against this seat to create a water-tight seal. When the seat chips, the disc can’t seal.
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Finished a Backflow preventer install on Villa Lane today in Napa. 1” RP valve above ground.
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10/28/17
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So what the heck are we doing when we test backflow preventers? We’re using a differential pressure gauge to see if the check valves inside your backflow device are closing tight. If the rubber discs make a tight seal, water cannot travel backwards into the city water supply. Each disc has to seal with a pressure reading of at least 1.0 to pass the test. Most Napa backflow devices at residential homes have 2 check valves per device. Need a test? Call us at 1-707-224-7497 or book online.
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Backflow testing in Napa today. People often forget they have these 3/4” devices attached to their fire suppression backflow preventer. They’re a detector assembly used to detect unauthorized water use.
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We see a lot of these girls up in St Helena. The nice warm environment under your freeze bag makes a comfy home. I think she’s looking at you.
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Thankfully the Napa Valley was spared from the devastating fires. Our thoughts are with those who were impacted by this tragedy.
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The water inside of fire suppression systems is especially foul. Notice the brown color. It’s important to keep your fire sprinkler system maintained and definitely have a backflow preventer installed to keep this water from entering the city water supply.
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What happens when your device has good shutoff handles but the screws are rusted? We have to replace the device. If we try to remove rusted screws they almost certainly break, and that’s a big problem. Here’s a before and after from Napa today.
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10/20/17
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