G Grizzly Backflow & Plumbing
Seattle, WA · 98101 Local testers · Utility reports filed

Thermal Expansion Tank Tie-In in Seattle, WA Near Me

Thermal expansion tank tie-in in Seattle, WA after a backflow preventer or check valve closes your water system. Call (833) 990-5874.

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Thermal Expansion Tank Tie-In in Seattle, WA
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(833) 990-5874
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RPZ, DCVA and PVB
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Thermal Expansion Tank Tie-In in Seattle, WA

Install a backflow preventer on a home's main line and you have created a closed system. When the water heater runs, heated water expands and has nowhere to go. Pressure climbs until the temperature and pressure relief valve on the heater, set at 150 psi, starts to weep.

A thermal expansion tank fixes that. It is a small steel tank with an air bladder, tied into the cold supply near the heater. The bladder absorbs the expansion.

The detail people skip is the air charge. The tank has to be pre-charged to match your static water pressure, checked with a tire gauge before it goes on. A tank left at the factory 40 psi on a 70 psi system does very little.

Sizing depends on heater capacity and water pressure. A 40 or 50 gallon heater usually takes a 2 gallon tank.

Grizzly Backflow & Plumbing connects Seattle, WA homeowners with plumbers who tie in expansion tanks as part of backflow prevention work. Call (833) 990-5874.

How it works

Four steps to backflow testing in Seattle, WA

  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 Seattle, WA

Backflow testing for the neighborhoods and ZIP codes around Seattle, WA.

Neighborhoods we cover for backflow testing

  • Capitol Hill
  • Ballard
  • Fremont
  • Queen Anne
  • West Seattle
  • University District
  • Belltown

ZIP codes we serve

98101 98102 98103 98104 98105 98106 98107 98108 98109 98112 98115 98116 98117 98118 98119 98121 98122 98125 98126 98133 98134 98136 98144 98146 98148 98154 98155 98158 98164 98166 98168 98174 98177 98178 98188 98195 98198 98199

Backflow testing FAQs

Questions about backflow testing

Questions we hear most often about Thermal Expansion Tank Tie-In in Seattle, WA.

Talk to a person
What happens if I miss the backflow test deadline?
Utilities usually send a second notice, and after that some add a fee or schedule a service shutoff. Calling (833) 990-5874 before the deadline is the simplest way to avoid it.
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.
Will my water be off during the test?
Yes, briefly. The tester closes the shutoff valves on the assembly while reading the checks, so water downstream of the device is off until the test is done.
What does a failed backflow test mean?
A check valve or the relief valve did not hold its required pressure differential. The device needs repair or replacement, then a retest before a passing report can be filed.
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.

Book a backflow test

Backflow Test Due in Seattle, WA? Call now.

Certified testers for backflow testing in Seattle, WA. 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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