1. What Is Water Tank Head Pressure?

Water tank head pressure is the pressure exerted by a column of water at the bottom of a tank due to the weight of the water above it. It's calculated using the formula P_g = ρ × g × h, where ρ is water density, g is gravity, and h is water height.

2. How Does The Calculator Work?

The calculator uses the head pressure formula:

Where:

• \( P_g \) — Gauge pressure at bottom of tank (Pa)
• \( \rho \) — Density of water (typically 1000 kg/m³)
• \( g \) — Acceleration due to gravity (9.81 m/s²)
• \( h \) — Height of water column (m)

Explanation: The pressure increases linearly with water height and depends on the density of the fluid and gravitational acceleration.

3. Importance Of Head Pressure Calculation

Details: Calculating head pressure is essential for designing water systems, determining pump requirements, ensuring proper water flow, and designing tank structures to withstand the pressure.

4. Using The Calculator

Tips: Enter water density (typically 1000 kg/m³ for fresh water), gravity (9.81 m/s² on Earth), and water height in meters. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: Does water temperature affect head pressure?
A: Yes, water density changes slightly with temperature, which affects pressure. Cold water is denser than warm water.

Q2: How does head pressure relate to water flow?
A: Higher head pressure typically results in greater water flow rate when outlets are opened, following Bernoulli's principle.

Q3: What's the difference between head pressure and static pressure?
A: Head pressure is a type of static pressure specifically caused by the weight of a fluid column above a point.

Q4: How does tank shape affect head pressure?
A: Head pressure depends only on height, not container shape. The pressure at the bottom is the same regardless of tank width.

Q5: Can I use this for other liquids?
A: Yes, but you must use the correct density value for the specific liquid you're calculating for.