NEW SCALA2 3-45 Model 2 Constant Pressure, Variable Speed, On-Demand Pump - NEW & IMPROVED

$869.95 - $899.95
28.20 LBS
$30.00 (Fixed Shipping Cost)
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Product Overview

NOTE: Fixed Shipping Rate doesn't include Hawaii or Alaska.

With the new GRUNDFOS SCALA2 3-45, Model 2 water booster pump, perfect water pressure is finally available in an all-in-one unit. Now you can enjoy the luxury of a perfectly comfortable shower any time of day – even when your family is using the many other taps in your home, for instance in the bathroom, the kitchen and the garden. And the SCALA2 is so compact and quiet, you won’t even know it’s there.

SCALA2 comes equipped with intelligent pump control, which means that it automatically adjusts operation to deliver the water pressure you like. The integrated sensor detects if the inlet pressure varies or if there are several taps open and immediately tells the pump to boost the pressure. And it happens so fast that you won’t notice any change in your water pressure at all 


  • Intelligent pump control
  • Water-cooled, permanent magnet motor
  • Dry running protection
  • Self-priming
  • User friendly control panel
  • Outdoor-ready
  • 115V


  • Perfect water pressure: In all taps at all times 
  • Affordable: Great value for money 
  • Low noise: 47 dB(A) in typical use 
  • Compact design: Fits inside a kitchen cupboard 
  • All-in-one unit: No complex installations 
  • User-friendly control panel: Easy to operate

SCALA 2 performance curve

Perfect water pressure – compact and easy to install

SCALA2 is a fully integrated water booster pump providing perfect water pressure in all taps at all times – even with multiple taps and showers running at the same time. It packs pump, motor, tank, sensor, drive and non-return valve into one compact unit. And with its intelligent pump control, SCALA2 automatically adjusts performance to both inlet pressure and water consumption in the home. Thanks to a water-cooled motor, SCALA2 even offers one of the lowest noise levels of any booster on the market.

What is intelligent pump control?

SCALA2 features a built-in sensor, which constantly measures the discharge pressure. If the pressure drops below the desired level, SCALA2 boosts its operation immediately to compensate for the loss of pressure. We call it intelligent pump control and the result is perfect water pressure.


  • Perfect water pressure: Intelligent pump control adjusts operation automatically
  • Low noise: As quiet as a modern dishwasher (47 dB(A) in typical use)
  • Easy selection: One variant for all domestic boosting needs
  • Easy installation: Compact, all-in-one solution, plug-and-pump
  • Easy to operate: User-friendly control panel
  • Reliable operation: Dry-running protection, anti-cycling
  • Long lifetime: Quality-tested to perfection, maintenance-free


SCALA2 is the perfect choice for residential buildings with up to 3 floors and 8 taps.

  • Boosting from mains: Increases the water pressure delivered by city mains
  • Boosting from tanks: Increases water pressure from roof tanks, break tanks and ground tanks, including rainwater tanks.
  • Boosting from wells: Pumps water from a depth of 26'

Suitable for both Indoor and outdoor installation X4D and Enclosure type 3(US).

Warranty is 24 months from the date of delivery and 30 months from the manufacturing date.

SCALA2 Video:

Grundfos SCALA2 is a fully integrated, self-priming, compact waterworks for pressure boosting in domestic applications. SCALA2 incorporates integrated speed control enabling the keeping of the perfect pressure at the taps, meaning that the pump performance will increase with increasing demand.

SCALA2 can be installed in three easy steps:
1. Connect the pipes. 2. Prime the pump. 3. Plug the pump into the power outlet and the pump will start.

Grundfos SCALA2 has all the components necessary to ensure a comfortable pressure:

  • intelligent controller
  • integrated speed-controlled drive
  • integrated tank
  • integrated sensors
  • integrated non-return valves.

If exposed to dry running, water shortage or excessive temperature, blocked pump, for example in case of seizure or overload, the pump will stop automatically, thus preventing a motor burnout.As it is self-priming, the SCALA2 is able to pump water from a level below the pump. Provided it is filled with water, the pump is able to lift water from a depth of 26' in less than 5 minutes. This facilitates easy installation and start-up of the pump and provides more reliable water supply in installations where there is a risk of dry running and leakages in suction hose or pipes.

The pump features an automatic reset function. In case of dry running or similar alarm, the pump will stop. Restarting will be attempted every 5 minutes 8 times, there after new restart attempt will occur every 24 hours. The automatic reset function can be deactivated.

Thanks to its hydraulic design, permanent magnet motor and water cooling, the pump is extremely low-noise, 47 dB(A) in typical use, which makes it suitable for indoor as well as outdoor use. Max noise level at full load are 53 dB(A)

The built-in pressure tank reduces the number of starts and stops in case of leakages in the pipe system, causing less wear on the pump.

SCALA2 require no maintenance, but it is recommended to keep the pump clean, check the non-return valves and keep the ventilation holes free of dust.



















Pumped liquid:    Water
Liquid temperature range:    32 .. 113 °F
Liquid temperature during operation:    68 °F
Density:    62.29 lb/ft³
Rated flow:    13.2 US GPM
Rated head:    88.59 ft
Primary shaft seal:    CARBON/CERAMIC
Approvals on nameplate:    cULus
Approvals for drinking water:    cULus NSF372,cULus DW NSF61
Curve tolerance:    ISO9906:2012 3B
Pump housing:    NORYL FE1630PW PPE+PS-GS30
Impeller:    NORYL FE1630PW PPE+PS-GS30
Range of ambient temperature:    32 .. 113 °F
Maximum operating pressure:    145 psi
Maximum permissible inlet pressure:    87 psi
Pipe connection:    NPT 1 Composite
Electrical data:
Power input - P1:    550 W
Mains frequency:    60 Hz
Rated voltage:    1 x 115 V
Rated current:    4.9 A
Enclosure class (IEC 34-5):    ENCLOSURE TYPE 3
Insulation class (IEC 85):    F
Length of cable:    6.562 ft
Power plug:    Type B (NEMA 5-15)
Net weight:    22.1 lb
Gross weight:    28.2 lb
Shipping volume:    1.55 ft³
Storage temperature range:    -40 .. 158 °F

Product Videos