The rooftop booster pump (known locally as the 'dynamo') is the heart of every Saudi villa's water supply system. Undersized, ageing, or failed pumps cause persistent low pressure that worsens over time. Replacing a failing or inadequate pump with a correctly sized inverter pump eliminates the problem immediately and provides 30–50% lower electricity consumption than fixed-speed pumps while handling demand fluctuations that would stall a fixed-speed motor.
What's Included
Peak demand calculation based on number of bathrooms, expected simultaneous usage, pipe network head loss, and rooftop height. Correct pump specification prevents the common failure of oversizing (pump hunts and short-cycles) or undersizing (pressure inadequate at peak demand).
Grundfos CM and CME series — the most reliable residential booster pumps in KSA service experience. Variable frequency drive (VFD) modulates motor speed with actual demand. Dry-run protection and built-in pressure monitoring included.
Wilo inverter pumps for multi-storey buildings and compounds. SiBoost series provides smart pressure maintenance across variable flow conditions — ideal for compound water distribution systems.
Economy-range installation for standard residential applications where budget is the primary constraint. These brands offer solid reliability at 60–70% of Grundfos/Wilo price.
Same-day repair for failed pump motors, pressure vessel replacement, pressure switch calibration, and non-return valve replacement. We carry common pump models on our service vans for direct swap where repair is uneconomical.
Expansion vessel sizing and installation, pressure gauge installation, isolation valves, inlet strainer, and non-return valve — all components of a properly designed pump station.
How It Works
Pricing Guide
Economy pump (DAB/Leo/Pedrollo, fixed speed): SAR 400–700 supply + SAR 300–500 installation. Mid-range inverter (Grundfos CM5/CM10): SAR 900–1,400 supply + SAR 400–600 installation. Premium inverter (Grundfos CME with integrated VFD): SAR 1,400–2,200 supply + SAR 500–700 installation. Large building/compound pump station (Grundfos Hydro MPC): SAR 4,000–12,000 installed. Emergency pump repair: SAR 300–800 + parts.
Frequently Asked Questions
What pump do you recommend for a 3-floor villa in Riyadh?
For a standard 3-floor, 4-bedroom villa in Riyadh, we specify a Grundfos CM5-5 or CM10-3 inverter pump (0.75–1.1 kW), matched with a 24-litre pressure vessel. This delivers 40–55 L/min at 3.5–4.5 bar throughout the building. The inverter modulates speed with demand, drawing full power only when multiple taps are open simultaneously — saving 25–35% on pump electricity versus fixed-speed alternatives.
Why does my booster pump keep burning out in the summer?
The most common causes are: (1) wrong-sized pump running at 100% continuously — remedy is to upsize the pump so it operates at 70–80% of rated flow, (2) dry-run operation due to insufficient tank level or float valve fault — remedy is to install dry-run protection and check tank fill valve, (3) voltage fluctuations in the Saudi grid during peak summer load causing motor overheating — remedy is a dedicated voltage stabiliser on the pump circuit.
Is an inverter pump worth the extra cost in Saudi Arabia?
For most Saudi buildings, yes. A Grundfos CME inverter pump costs SAR 700–1,000 more than an equivalent fixed-speed pump. It saves 25–35% on pump electricity (typically SAR 600–1,200/year for a villa-sized pump running during Saudi summer peak), lasts 30–50% longer due to reduced thermal stress from variable-speed operation, and eliminates the pressure surges that cause premature tap washer and valve failure in the building. ROI is 1–2 years.
Can I install a variable speed pump on an existing system or do I need new pipework?
In almost all cases, an inverter pump replaces the existing fixed-speed pump using the same pipe connections. The pump footprint is identical or smaller, and the electrical connection uses the same supply cable (same kW rating). No new pipework is needed. The only exception is if the existing pipe connections use non-standard fittings — we carry a full set of BSP/metric adaptor unions to handle all configurations found in Saudi buildings.