Description
The Grundfos 99631739 (SCALA1 5-55) is a Pressure Booster — Compact. Fully integrated compact pressure booster for domestic water supply. Nominal performance: 22US gpm at 90.56ft. Rated 230V, 1-Phase, 60 Hz. Applications include Residential groundwater intake, Residential rainwater harvesting, Residential water pressure boosting.
Genuine Grundfos Part
OEM component engineered and manufactured to Grundfos specifications. Maintains pump performance and warranty coverage.
Full Traceability
Genuine Grundfos parts carry manufacturer traceability from production through delivery. No counterfeit risk.
Authorized Source
PumpStop is an authorized Grundfos distributor. All parts are genuine — not aftermarket, not surplus.
Confirm Compatibility
Always verify part number against your pump model number and serial number before ordering. Contact PumpStop for parts identification assistance.
Technical Support Available
PumpStop technical team can identify correct parts from pump nameplate data, serial number, or model code. Call (781) 281-8905 or chat.
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Parts availability varies. Contact PumpStop to confirm stock, lead time, and pricing before placing an order.
| Model Number | 99631739 |
| Product Series | SCALA1 |
| Series Description | Pressure Booster — Compact |
| Power | 1.09HP |
| Voltage | 230V |
| Phase | 1-Phase |
| Frequency | 60 Hz |
| Full Load Current | 5.25A |
| Insulation Class | F |
| Protection Class (IP) | IPX4D |
| Nominal Flow | 22US gpm |
| Nominal Head | 90.56ft |
| Max Operating Pressure | 116.03psi |
| Max Fluid Temperature | 113°F |
| Max Ambient Temperature | 131°F |
| Inlet Connection | 1inch |
| Outlet Connection | 1inch |
| Pipe Pressure Rating | PN 8 |
| Impeller Material | Composite |
| Housing Material | Composite |
| Approvals / Certifications | CSA, cULus, CCSAUS, CSA LLC, PROP6 |
| Electrical | Verify supply voltage, phase, and frequency match nameplate before installation: 230V, 1-Phase, 60 Hz. |
| Temperature limits | Do not exceed max fluid temperature 113°F or max ambient temperature 131°F. Exceeding limits damages seals and motor insulation. |
| Dry running | Do not run dry. SCALA1 pumps use the pumped fluid to lubricate the shaft seal. Dry running destroys the seal within seconds. Install dry-run protection on all automatic installations. |
| Maintenance | Refer to the Grundfos Installation and Operating Manual (IOM) for correct installation, commissioning, and maintenance. Contact PumpStop for documentation. |
- EAN
- 5713832222018
- Applications
- Pressure boosting, Domestic water supply
- Approvals
- CCSAUS
- Approvals for drinking water
- CSA DW
- Connection
- PN 8
- Curve tolerance
- ISO9906:2012 3B
- Density
- 62.29 lb/ft³
- Enclosure class (IEC 34-5)
- X4D
- Gross weight
- 35.3 lb
- Housing
- Composite
- Impeller
- Composite
- Insulation class (IEC 85)
- F
- Length of power cable
- 1.5 m
- Liquid temperature range
- 32 .. 113 °F
- Mains frequency
- 60 Hz
- Material Pricing Group
- 16
- Maximum current consumption
- 5.25 A
- Maximum head
- 180.5 ft
- Maximum operating pressure
- 8 bar
- Maximum permissible inlet pressure
- 2 bar
- Model
- A
- Net weight
- 30.9 lb
- Power plug
- NEMA 6-15
- Pressure rating for connection
- PN 8
- Product family
- SCALA1
- Pump housing
- Composite
- Pumped liquid
- Water
- Range of ambient temperature
- 32 .. 131 °F
- Rated flow
- 21.5 US gpm
- Rated head
- 82.02 ft
- Rated power - P2
- 0.81 kW
- Rated voltage
- 1 x 230 V
- Real Time
- 1 Available on 10/12/2023 Plant: Allentown Update with real time availability and Net price
- Selected liquid temperature
- 68 °F
- Shaft seal type
- BVBP
- Size of inlet connection
- 1 inch
- Size of outlet connection
- 1 inch
- Start pressure
- 2.8 bar
- Type
- BVBP
- Type of inlet connection
- NPT(M)
- Type of outlet connection
- NPT(M)
Dimensional Drawing