What Is This Tool?
This tool enables conversion of pressure units specifically from foot water (4°C) to atmosphere technical (at). It is designed to assist in translating hydraulic head or low-pressure measurements into legacy engineering and industrial units commonly used in historical and technical contexts.
How to Use This Tool?
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Enter the pressure value in foot water (4°C) units
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Select foot water (4°C) as the source unit
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Choose atmosphere technical [at] as the target unit
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Click convert to obtain the equivalent pressure in atmosphere technical
Key Features
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Converts pressure values from foot water (4°C) to atmosphere technical units
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Supports understanding of hydraulic head and low-pressure data
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Useful for interpreting historical and industrial engineering documents
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Browser-based and easy to use without installation
Examples
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Convert 10 foot water (4°C) to atmosphere technical: 10 ftAq = 0.304791137 at
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Convert 50 foot water (4°C) to atmosphere technical: 50 ftAq = 1.523955685 at
Common Use Cases
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Specifying hydraulic head and low pressures for pumps and water distribution systems
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Interpreting manometer or gauge readings in laboratory, HVAC, or fluid instrumentation contexts
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Expressing static head or pressure-depth relationships in groundwater and well monitoring
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Converting legacy pressure ratings in boilers, hydraulics, and pneumatic system maintenance
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Comparing older pressure measurements to modern SI units when analyzing historical data
Tips & Best Practices
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Ensure the pressure value corresponds to water at 4°C for accurate interpretation
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Use this converter primarily for low-pressure or hydraulic head scenarios
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Be cautious when integrating technical atmosphere units in modern systems due to their non-SI status
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Refer to historical equipment documentation when using atmosphere technical units
Limitations
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Foot water (4°C) specifically applies to water at 4°C; different fluids or temperatures affect accuracy
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Atmosphere technical is a non-SI unit, largely replaced by modern SI units
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Conversion may not be precise when applied outside of the defined context or temperatures
Frequently Asked Questions
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What does foot water (4°C) measure?
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Foot water (4°C) expresses pressure as the hydrostatic pressure exerted by a 1-foot column of pure water at 4°C, commonly used for low pressures or hydraulic head.
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What is the atmosphere technical unit?
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The atmosphere technical (at) is a non-SI pressure unit defined as one kilogram-force per square centimetre, used historically in engineering and industrial applications.
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Why convert from foot water (4°C) to atmosphere technical?
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Conversion helps interpret hydraulic head measurements in legacy pressure units found in older technical literature and equipment specifications.
Key Terminology
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Foot water (4°C) [ftAq]
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A pressure unit equal to the hydrostatic pressure of a 1-foot column of pure water at 4°C, commonly used to express low pressures or hydraulic head.
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Atmosphere technical [at]
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A non-SI pressure unit defined as one kilogram-force per square centimetre, historically used in engineering and industrial pressure specifications.
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Hydraulic head
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The height of a water column that represents pressure exerted by a fluid at a given point.