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Grundfos SCALA1 5-55 — 99631754 Water Booster Pump 115V

by Grundfos
SKU 99631754
$ 991.42 - $ 991.42
$ 991.42
$ 991.42 - $ 991.42
$ 991.42

Grundfos SCALA1 5-55 (99631754) — 115V High-Head Booster Pump

The Grundfos SCALA1 5-55 at 115V brings full smart booster pumping performance to households powered by standard 115V circuits. It integrates pump, motor, pressure sensor, control electronics, and a small buffer tank in a fully sealed package, offering up to ~5 to 55 GPM and strong head capacity. Bluetooth connectivity, diagnostics, and protection features make it an intelligent pick for pressure boosting. )

Key Features & Benefits

  • 115V motor option for circuits without 230V availability
  • Integrated, self-priming booster system with minimal external parts
  • High performance: up to ~55 GPM/45 m head (depending on conditions)
  • Bluetooth-enabled control and monitoring via Grundfos GO
  • Protection built in: dry-run, lock-up, overload detection
  • Quiet operation (~55 dB) in sealed IP6X housing

Applications

  • Residential pressure boosting on 115V supply
  • Tank-to-home setups and weak municipal pressure cases
  • Low-to-mid elevation irrigation circuits
  • Backup or remote installations where 230V isn't available

Specifications

Model / Variant SCALA1 5-55 (99631754)
Flow Range 5 – 55 GPM (varies by system conditions)
Max Head ~ 147 ft / ~45 m
Voltage / Phase 115 V, Single Phase
Motor Type Brushless DC, variable-speed
Protection & Control Sealed, built-in diagnostics
Sound Level ~55 dB

 

Common Questions

Q: Why 115V vs 230V version?
A: Use this variant when your site only has 115V supply or to avoid rewiring to 230V.

Q: Can it maintain pressure with multiple taps open?
A: Yes — its variable-speed control adjusts output to sustain pressure under varying loads.

Q: What protections are included?
A: Dry-run, lock-up, overload, diagnostics, and motor protection are built in.

Q: Is 115V less efficient?
A: Efficiency differences are minimal; performance per curve remains largely the same as long as application conditions are within spec.

 

SCALA1 5-55 at 115V delivers high head and smart booster performance for systems constrained to standard voltage supply.

Compare Grundfos SCALA1 Booster Pump Models

Model Voltage Flow Range (GPM) Max Head (m / ft) Type Connectivity Key Use Case
SCALA1 3-45 (99631736) 230 V Up to ≈ 14 GPM ≈ 45 m / 148 ft Self-priming Bluetooth via Grundfos GO app General residential boosting (230 V supply)
SCALA1 3-45 (99631742) 115 V Up to ≈ 14 GPM ≈ 45 m / 148 ft Self-priming Bluetooth via Grundfos GO app Homes with standard 115 V circuits
SCALA1 5-55 (99631739) 230 V Up to ≈ 18 GPM ≈ 55 m / 180 ft High-head, self-priming Bluetooth via Grundfos GO app Multi-story homes / longer pipe runs
SCALA1 5-55 (99631754) 115 V Up to ≈ 18 GPM ≈ 55 m / 180 ft High-head, self-priming Bluetooth via Grundfos GO app High-performance boosting on 115 V supply

 

All SCALA1 boosters share the same smart, compact design — just choose your voltage and performance level for the perfect household pressure solution

Electrical data
Max. P1 1250 W
Rated power - P2 1.15 HP
Main frequency 60 Hz
Rated voltage 1 x 115 V
Rated current 11.6 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

Technical
Rated flow 23.2 US gpm
Rated head 82.02 ft
Maximum head 180.5 ft
Primary shaft seal BVBP
Approvals CSA,CCSAUS,CSA LLC,PROP65
Approvals for drinking water CSA DW
Curve tolerance ISO9906:2012 3B
Model A
Start pressure 40.61 psi

Installation
Range of ambient temperature 32 .. 131 °F
Maximum operating pressure 116.03 psi
Maximum permissible inlet pressure 29.01 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/ft


Net weight 30.9 lb
Gross weight 35.3 lb
Shipping volume 1.62 ft³
Storage temperature range -40 .. 158 °F
Country of origin HU

View Spec Sheet (PDF)
View Install Manual (PDF)

Product Video

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