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The Grundfos SCALA1 is a fully integrated, self-priming pressure booster that combines a multistage pump, water-cooled motor, small pressure vessel, check valve and electronic controls in one corrosion-resistant composite enclosure. It provides steady water on demand for homes, cabins and light-commercial supply.
Fixed-speed operation with built-in dry-running, anti-cycling and maximum-runtime protection. Bluetooth (Grundfos GO) and an external input add float-switch and irrigation control, and two units pair into a twin booster for standby duty or higher flow. Runs under 55 dB(A). Ports are 1 in NPT on both suction and discharge.
| Specification | SCALA1 3-45 | SCALA1 5-55 |
|---|---|---|
| Nominal Flow | 13 GPM (3 m³/h) | 22 GPM (5 m³/h) |
| Nominal Duty Point | 15.8 GPM at 82 ft | 23.5 GPM at 82 ft |
| Max Head (60 Hz) | 150 ft (46 m) | 180 ft (55 m) |
| Motor Output (P2) | 0.80 HP | 1.10 HP |
| Max Power Input (P1) | 1.28 HP (950 W) | 1.68 HP (1250 W) |
| Supply Voltage | 115V or 230V, 1-phase, 60 Hz | 115V or 230V, 1-phase, 60 Hz |
| Max Inlet Pressure | 43 psi (3 bar) | 29 psi (2 bar) |
| Max System Pressure | 116 psi (8 bar) | 116 psi (8 bar) |
| Max Suction Lift | 26 ft (8 m) | 26 ft (8 m) |
| Ports | 1 in NPT suction and discharge | 1 in NPT suction and discharge |
| Noise Level | < 55 dB(A) | < 55 dB(A) |
| Max Ambient / Liquid Temp | 131°F / 113°F | 131°F / 113°F |
| Enclosure | Composite | Composite |
| IP Rating | IPX4D | IPX4D |
| Twin Booster | Yes (accessory kit) | Yes (accessory kit) |
| Certifications | NSF/ANSI 61 + 372, CSA, CE | NSF/ANSI 61 + 372, CSA, CE |
Dry-running protection, anti-cycling / micro-leakage detection, adjustable maximum-runtime timer and current- and temperature-dependent motor protection with automatic restart — no external motor protection required.
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