Skip to content
Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376
Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376
Grundfos pump on a white background

Grundfos SCALA1 3-45 — 99631736 Water Booster Pump 230V

by Grundfos
SKU 99631736
$ 852.99 - $ 852.99
$ 852.99
$ 852.99 - $ 852.99
$ 852.99

Grundfos SCALA1 3-45 (99631736) — Self-Priming All-in-One Booster Pump

The Grundfos SCALA1 3-45 is a sleek, integrated booster pump system combining motor, pump, sensor, controller, and tank into one composite enclosure. Designed for residential pressure boosting and tank-fed systems, it delivers ~14 GPM and up to 147 ft head, with smart features like Bluetooth connectivity and built-in protections. 

Key Features & Benefits

  • Compact, all-in-one design — minimal footprint and wiring
  • Self-priming capability (can lift from depths up to ~8 m) 
  • Bluetooth connectivity for monitoring & configuration via Grundfos GO app 
  • Built-in protections: dry-run shutoff, cycling protection, max runtime, motor overload 
  • Quiet operation around 55 dB 

Applications

  • Residential homes and apartments
  • Pressure boosting for weak municipal supply
  • Garden irrigation and tank-to-home supply
  • Rainwater harvesting systems (boost from tank)

Specifications

Model / Variant SCALA1 3-45 (99631736)
Rated Flow ~14 GPM (US) 
Max Head 147.6 ft (45 m)
Rated Voltage / Phase 230 V, Single-phase 
Working Pressure 116 psi (8 bar) 
Max Inlet Pressure 43.5 psi (3 bar) 
Noise Level ~55 dB 

 

Common Questions

Q: How deep can it self-prime?
A: Up to ~8 m (≈ 26 ft), with proper priming procedure and airtight suction line. 

Q: Does it need a control box or external parts?
A: No — it’s an integrated system. All components are built into the one unit. 

Q: Can I monitor it via smartphone?
A: Yes — built-in Bluetooth enables communication with Grundfos GO app for monitoring and settings.

Q: Is it quiet enough for indoor installation?
A: Yes — it’s rated around 55 dB, which is acceptable for many indoor or near-living-space installs.

 

SCALA1 3-45 gives you compact, smart pressure boosting with built-in protections and minimal setup — ideal for homes that demand no-fuss performance.

This item replaces: 96860201, 96860207

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 900 W
Rated power - P2 0.764 HP
Main frequency 60 Hz
Rated voltage 1 x 230 V
Rated current 3.71 A
Enclosure class (IEC 34-5) X4D
Insulation class (IEC 85) F
Length of power cable 4.92 ft
Power plug NEMA 6-15 US plug 230V

Technical
Rated flow 14 US gpm
Rated head 82.02 ft
Maximum head 147.6 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 31.91 psi

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

Net weight 26.5 lb
Gross weight 30.9 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

No related articles found.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare