Grundfos SCALA1 3-45 Booster Pump

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The Grundfos SCALA1 3‑45 is a compact, all‑in‑one self‑priming booster pump designed to deliver dependable water pressure for a wide range of domestic and light‑commercial applications. With integrated smart controls, quiet operation, and easy installation, the SCALA1 3‑45 provides reliable water boosting from taps to irrigation systems.

Strong, Reliable Boosting Performance

The SCALA1 3‑45 delivers a powerful combination of head and flow suited for medium‑demand installations:

  • Maximum head: 150 ft (45 m)
  • Nominal head: 82 ft (25 m)
  • Nominal flow: 13 US GPM 

This performance makes it ideal for everyday household pressure boosting and small‑scale commercial uses.

Product Number: 99631742

Features and Benefits

All‑In‑One Integrated Design

Every SCALA1 pump comes pre‑assembled with:

  • Pump and motor
  • Diaphragm pressure tank
  • Pressure & flow sensors
  • Dry‑running protection
  • Controller and built‑in non‑return valve

This eliminates the need for external components and significantly simplifies installation.

Smart, Bluetooth‑Enabled Control

With built‑in Bluetooth®, the SCALA1 3‑45 connects directly to the Grundfos GO app for:

  • Real‑time pump monitoring
  • Alarm and diagnostic insights
  • On‑site report generation
  • Advanced setup and tuning

This allows quick customization for a wide range of water‑supply systems.

Fast, Simple Installation

The SCALA1 3‑45 features an effortless 3‑step installation process:

  1. Connect the pipework
  2. Prime the pump
  3. Plug it in and configure via the control panel or GO app

It’s one of the easiest boosters on the market to commission.

Low‑Noise Operation

Operating at under 55 dB(A)—similar to a quiet dishwasher—the SCALA1 3‑45 is suitable for indoor or outdoor placement near living areas.

Built for Long‑Term Durability

  • Indoor/outdoor IPX4D rating
  • Max ambient temperature: 131°F (55°C)
  • Max liquid temperature: 113°F (45°C)
  • Max system pressure: 115 psi (8 bar)
  • Maintenance‑free water‑cooled motor

Designed for stability, efficiency, and long‑term reliability.

Versatile Application Range

The SCALA1 3‑45 is ideal for:

  • Boosting from city mains
  • Water supply from roof tanks, break tanks, and ground tanks
  • Shallow wells with suction up to 26 ft (8 m)
  • Rainwater harvesting setups

Perfect for:

  • Homes with multiple taps and showers
  • Garden or lawn irrigation
  • Small commercial uses such as greenhouses or produce areas

Twin‑Pump Compatible

For higher flow or built‑in redundancy, the SCALA1 3‑45 can be paired with another SCALA1 pump using the Twin Accessories Kit, enabling duty/assist or duty/standby operation.

Specifications

Technical

Rated flow 13.2 US gpm
Rated head 105.6 ft
Maximum head 150.9 ft
Primary shaft seal BVBP
Approvals CSA,cULus,CCSAUS,CSA LLC,PROP6
Approvals for drinking water CSA DW
Start pressure 31.91 psi

Materials

Pump housing Composite
Impeller Composite

Installation

Range of ambient temperature 32 .. 131 °F
Maximum operating pressure 116.03 psi
Maximum permissible inlet pressure 43.51 psi
Type of inlet connection NPT(M)
Type of outlet connection NPT(M)
Size of suction port 1 inch
Size of outlet port 1 inch
Pressure rating for connection PN 8

Liquid

Pumped liquid Water
Liquid temperature range 32 .. 113 °F
Selected liquid temperature 68 °F
Density 62.29 lb/ft³

Electrical data

Max. P1 950 W
Rated power - P2 0.791 HP
Main frequency 60 Hz
Rated voltage 1 x 115 V
Rated current 8.62 A
Enclosure class (IEC 34-5) X4D
Insulation class (IEC 85) F
Length of power cable 4.92 ft
Power plug Type B (NEMA 5-15)  US plug 115V

Others

Net weight 26.5 lb
Gross weight 30.9 lb
Shipping volume 1.62 ft³
Storage temperature range -40 .. 158 °F


Downloads

SCALA Data Booklet

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Grundfos SCALA1 3-45 Booster Pump
Grundfos SCALA1 3-45 Booster Pump
$876.00
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