Pressure booster · Grundfos

Grundfos SCALA2 3-45 Pressure Booster

The benchmark home booster

Updated October 2026

Quick verdict

The premium choice for whole-house boosting.

Strength
Smart, quiet and self-contained.
Trade-off
Expensive.
Right buyer
Homes with low city or tank pressure.
Horsepower
1/2 HP
Max head / lift (maker)
8 m
Voltage
115 V
Dimensions (seller)
15.9"L x 7.6"W x 11.9"H
Product weight
22 lb
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Why it matters

The SCALA2 is Grundfos's all-in-one home booster: pump, motor, tank, pressure sensor and controls in one compact unit. Its intelligent control adjusts speed to demand, so pressure stays steady as taps open and close.

Grundfos puts it at about 47 dB(A) in typical use, like a modern dishwasher. One version covers all domestic boosting, and it can draw water from a depth of 8 m (26 ft) for tanks and shallow sources.

Who it's for, and who should skip it

Good fit if

  • Low city pressure
  • Tank and cistern supplies
  • Quiet utility rooms

Look elsewhere if

  • Tight budgets
  • Deep wells
  • Commercial demand

Pros and cons

Pros

  • Constant pressure
  • Quiet
  • All-in-one

Cons

  • High price
  • 8 m suction limit
  • Needs a dedicated outlet

Limitations to weigh

  • Install a booster after the meter or pressure tank, with isolation valves; some water utilities restrict boosting on the main, so check local rules.
  • Self-priming still needs the pump primed at first start; follow Grundfos's start-up steps.

Specifications

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

MaterialStainless SteelRetailer
Dimensions (seller)15.9"L x 7.6"W x 11.9"HRetailer
Product weight22 lbRetailer
Max head / lift (maker)8 mRetailer
Voltage115 VRetailer
Horsepower1/2 HPRetailer
Model number98562818Retailer

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Final verdict

The one to buy if quiet, steady pressure matters most.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

How loud is the SCALA2?
About 47 dB(A) in typical use, per Grundfos.
Can it boost from a tank?
Yes, it can draw from up to 8 m (26 ft) below.