Flow-Tech Tester: How to Verify Signal Presence in the Plumbing System
The Flow-Tech tester is used to confirm that the Flow-Tech system signal is present and traveling through the water. Because Flow-Tech uses a radio frequency carried in the fluid, the signal can be detected at multiple points in the plumbing system. This article explains how to use both the older and newer Flow-Tech testers correctly.
What the Flow-Tech Tester Does
The tester detects the radio frequency signal traveling through the water. This allows technicians to confirm:
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The system is operating properly
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The signal is moving beyond the installation point
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The signal is present where scale control is needed
Signal testing is especially useful when investigating scale related concerns.
Battery Requirements
Both the older and newer testers use a 9-volt battery.
Best practices:
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Always use a fresh battery
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Keep a backup battery available
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Remove the battery if the tester is not being used for an extended period
Low battery power can prevent accurate signal detection.
Using the Older Flow-Tech Tester
With the older tester:
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Hold the tester firmly so it remains powered
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If contact is broken, the tester will power off
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The signal can travel through conductive paths, including water and the human body
When properly detecting signal, the indicator light will activate while contact is maintained.
Using the New Flow-Tech Tester
The newer tester includes a green indicator light.
To test:
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Hold the tester firmly
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Touch the upper section of the tester above the green light
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Make contact with a conductive metal surface that contains water
Examples of good test points include:
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Angle stops
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Supply lines
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Metal faucet bases
Plastic fittings or dry components will not provide a valid reading.
Where to Test for Signal
Signal may not be detected at every location, which is normal.
You should:
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Test at least one or two locations away from the installation point
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Avoid testing only right next to the unit
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Confirm signal presence at fixtures or supply points downstream
This helps verify system wide signal coverage.
Understanding the Light Indicators
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Solid light
Indicates strong signal, usually near the installation point -
Flashing light
Indicates signal presence further away from the unit
This flashing represents the signal traveling throughout the system
Both indications confirm proper operation.
When to Use the Tester
Use the Flow-Tech tester when:
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Verifying a new installation
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Investigating reported scale issues
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Confirming signal coverage before leaving a job site
Having a tester on hand can help prevent return visits.
Key Takeaway
The Flow-Tech tester allows technicians to verify that the system signal is present and active throughout the plumbing system. Proper testing ensures confidence in installation and performance.
Need Help
For questions about signal testing or unusual applications, contact Plumber’s Choice Water support or your Flow-Tech representative.