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Water Pressure Equation:
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The water pressure equation calculates pressure in psi from water height in feet. It is based on the principle that water pressure increases linearly with depth/height due to the weight of the water column above.
The calculator uses the water pressure equation:
Where:
Explanation: The constant 0.433 represents the pressure exerted by a 1-foot column of water, derived from the density of water and gravitational acceleration.
Details: Accurate water pressure calculation is essential for designing water systems, plumbing, irrigation systems, and understanding hydrostatic pressure in various engineering applications.
Tips: Enter water height in feet. The value must be valid (height > 0). The calculator will compute the corresponding water pressure in psi.
Q1: Why is the constant 0.433 used?
A: This constant represents the pressure in psi exerted by a 1-foot column of water, calculated from water density (62.4 lb/ft³) and gravitational acceleration.
Q2: Is this calculation accurate for all temperatures?
A: The calculation assumes standard conditions (water at 4°C). For precise applications, temperature corrections may be needed as water density changes with temperature.
Q3: Can this be used for saltwater calculations?
A: No, this equation is for freshwater. Saltwater has higher density (about 64 lb/ft³), requiring a different constant (approximately 0.445 psi/ft).
Q4: What are typical water pressure values in residential systems?
A: Residential water pressure typically ranges from 40-80 psi. Pressures above 80 psi may require pressure-reducing valves.
Q5: How does elevation affect water pressure?
A: Water pressure depends on the height of the water column above the measurement point, not on elevation above sea level.