= Hazen-Williams roughness coefficient (e.g., 140 for PVC, 100 for unlined cast iron) = Inside pipe diameter (meters)
(Velocity Head): The energy required to accelerate the water. This is often small enough to be neglected in residential systems but is calculated as
Every fixture has a minimum functional pressure (e.g., 20–30 PSI for a standard shower). Conversion booster pump head calculation xls
(Friction Loss): The "drag" caused by the pipe walls and fittings (elbows, valves, etc.). Hpressurecap H sub p r e s s u r e end-sub
Inside diameter (D), pipe material, and absolute roughness (Оµ). = Hazen-Williams roughness coefficient (e
While you can calculate TDH manually, using a spreadsheet (like an XLS file) makes the process infinitely easier, allowing you to quickly iterate through different pipe diameters, friction factors, and flow rates. What is a Booster Pump and Why Does Head Matter?
A good booster pump head calculator XLS is a great starting tool for engineers and technicians, but always verify results with manufacturer pump curves and consider system changes over time. Hpressurecap H sub p r e s s
): The vertical elevation change from the water source to the highest or furthest fixture. Pressure Head ( Hpressurecap H sub p r e s s u r e end-sub
If you choose to create your own spreadsheet, follow this architecture:
Where: