UAE DOMESTIC WATER · MEP CALCULATION SHEET
Booster Pump Head Calculator
Total Dynamic Head sized two ways in parallel — local UAE practice (Hazen–Williams, DEWA/Dubai-aligned defaults) alongside an international Darcy–Weisbach cross-check — so the design head you submit is defensible either way.
SI · m, m³/h, bar
Duty & Design Factors
Design flow is the peak simultaneous demand for this pump set (per BS EN 806-3 / fixture-unit method, or plant schedule).
m³/h
%
Typical 10–15% over calculated head%
Static & Terminal Conditions
Elevation and the pressure the most remote / highest fixture must still see once the pump is running.
m
Measured from pump centreline / tank water levelbar
1.0–1.5 bar typical; use 1.5–2.0 bar for mixer showersbar
Incoming main pressure available at the pump suction — deducted from the static liftSUCTION PIPEWORK
m
m
mm
DISCHARGE PIPEWORK
m
m
mm
Basis of calculation. Local column uses the Hazen–Williams friction method with C-factors and residual-pressure conventions common to UAE domestic water design (DEWA / Dubai Municipality-aligned consultant practice). International column is an independent Darcy–Weisbach check (Colebrook–Swamee–Jain friction factor, Hydraulic Institute velocity guidance) at 20°C. Defaults are typical, editable assumptions — confirm project-specific residual pressure, fixture demand and Civil Defence requirements, and verify the final duty point against the selected pump's published curve.
Recommended Design Head
50.0m TDH
4.90 bar
71.1 psi
3.77 kW shaft power
Method Comparison
LOCAL PRACTICE
Hazen–Williams · UAE/DEWA-aligned
49.7m
INTERNATIONAL CHECK
Darcy–Weisbach · Hydraulic Institute
49.6m
| COMPONENT | LOCAL (M) | INT'L (M) |
|---|
Pipework Velocity Check
Suction · 90 mm
0.79 m/s
OK
Discharge · 65 mm
1.51 m/s
OK
Guidance range: 0.6–1.5 m/s suction, 1.0–3.0 m/s discharge. Outside this band typically means the pipe is under- or over-sized for the duty flow.
Engineering aid for preliminary sizing only · not a substitute for a certified hydraulic calculation, manufacturer pump curve, or Civil Defence / DEWA approval.