| Definition | Water pressure is the force exerted by water per unit area of the surface. |
| Formula | P = ρgh, where P is pressure, ρ is density of water, g is gravitational acceleration, and h is height of water column. |
| SI Unit | Pascal (Pa) |
| Key Factors | Density of liquid (ρ), height of liquid column (h), gravitational acceleration (g), external pressure. |
| Pressure Loss Formula | Pressure loss = 0.4335 x h (height) |
| Hydrostatic Pressure | Pressure exerted by a column of liquid, increases with depth. |
| Measurement Principles | Pressure is measured based on weight of a liquid column and external pressures. |
| Importance of Pressure Tanks | Protects and extends pump life, provides water storage under pressure, reserves capacity for peak demand, reduces system maintenance. |
| Typical Pressure Range | Most homes have pressure between 40 PSI to 60 PSI. |
| Pressure Tank Types | Diaphragm/bladder tanks, tanks with floating wafer, plain steel tanks. |
| Pressure Tank Functions | Stores water, provides water under pressure, builds up reserve supply, prolongs pump life. |
| Minimum Pressure Requirement | At least 10 PSI for most fixtures, up to 30 PSI for some appliances. |
| Pressure Tank Selection | Multiply pump flow rate by four to determine size of diaphragm or bladder tank. |
| High-Rise Building Considerations | Water pressure tanks essential for consistent supply, compensate for gravity limitations. |
| Maintenance | Regular inspections, pressure checks, cleaning, sanitization, component checks. |