Grundfos Booster Pump

What is the Grundfos SCALA1?

The Grundfos SCALA1 is a compact automatic booster pump designed for homes and small buildings. It integrates the pump, motor, pressure and flow sensing, and control electronics into a single body, eliminating the need for a separate pressure switch, large tank, or control panel. It activates when a faucet is opened, stops when use ends, and maintains pressure at the set value. The "3-45" in the product name indicates the model's capacity class.

Key features

• Compact design: Can be easily installed in tight spaces, a boiler room, or next to a storage tank.
• Quiet operation: Developed with residential indoor use in mind.
• Self-priming design: Can draw water even when installed above the storage level.
• Protection functions: Includes functions to protect the pump in situations such as dry running.
• No Plug option: For installations where the cable connection will be made by a plumber or electrician.

Who is it suitable for?

SCALA1 is suitable for detached houses, vacation homes, small apartment buildings, and domestic water systems fed from a storage tank. It also maintains stable pressure when several taps are used simultaneously for garden irrigation. For multi-unit buildings requiring higher capacity, booster pump sets are a more appropriate choice. The pump's capacity and maximum pressure are stated on the product page; compare them with the height of your building and the number of usage points before deciding.

Installation notes

The unit must be connected in accordance with the directional markings on the inlet and outlet ports. Installing a strainer or filter on the suction line prevents sand and sediment from entering the pump. Before the first start-up, the pump casing must be filled with water as described in the user manual.

Frequently asked questions

Does the SCALA1 require a tank?

No separate tank is required for basic use. If there are minor leaks in the system, a small tank recommended by the manufacturer can reduce unnecessary pump cycling.

What does "no plug" model mean?

The product is delivered without an attached plug; the electrical connection is made with an appropriate fuse and cable.

Are there other models with similar capacity?

You can browse the domestic booster pumps category for similar booster pumps from different brands.

How many taps can the SCALA1 supply simultaneously?

This depends on the pump's flow rate and the desired pressure at the taps. You can compare the flow rate value on the product page with the number of taps and showers you plan to use at the same time to make your decision.