Product Overview
The Grundfos SCALA1 3-45 model 99631742 is a 115V self-priming booster system that combines the pump, motor, sensor, controller, and small pressure tank in one enclosure. It automatically responds as water demand begins and ends, making it suitable for properly sized residential pressure-boosting, storage-tank, shallow-source, rainwater, and garden-water installations. Bluetooth communication supports compatible monitoring and setup through the Grundfos GO app.
This version has a confirmed rated flow of 14.9 GPM, rated head of 82.02 ft, and maximum head of 150.9 ft. Pump output changes as total dynamic head changes, so the maximum flow and maximum head cannot be expected at the same operating point. Determine the required flow and delivery pressure after accounting for inlet conditions, elevation, suction lift, pipe losses, and the desired system pressure.
The 115V model uses a Type B NEMA 5-15 plug and draws a confirmed rated current of 8.62A. Verify that the dedicated circuit, plumbing, water source, installation location, and operating limits comply with the Grundfos manual. This model is identified as a replacement reference for Grundfos 96860172; compare the full application before substitution.
Key Features:
- Integrated self-priming booster system
- 115V single-phase operation
- Pump, motor, sensor, controller, and tank in one unit
- Bluetooth support through the Grundfos GO app
- Automatic response to water demand
- Built-in operating protections
- 1 in. NPT male inlet and outlet
Common Uses:
- Boosting low residential water pressure
- Supplying a home from a storage tank or cistern
- Compatible shallow-source and rainwater systems
- Garden and light irrigation pressure support
Technical Specifications:
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Model: SCALA1 3-45
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Product Number: 99631742
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Voltage: 115V single phase
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Maximum Input Power: 950W
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Rated Motor Output: 0.791 HP
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Rated Current: 8.62A
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Rated Flow: 14.9 GPM
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Rated Head: 82.02 ft
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Maximum Head: 150.9 ft
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Start Pressure: 31.91 PSI
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Maximum Operating Pressure: 116.03 PSI
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Maximum Inlet Pressure: 43.51 PSI
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Connections: 1 in. NPT male inlet and outlet
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Liquid Temperature Range: 32-113°F
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Power Cord: 4.92 ft with NEMA 5-15 plug
Dimensions and Weight:
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Net Weight: 26.5 lb
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Gross Weight: 30.9 lb
Installation and Sizing Notes:
Use the pump curve to confirm the required flow at the calculated total dynamic head. Verify circuit capacity, suction conditions, pipe size, inlet pressure, water temperature, drainage, ventilation, service access, and freeze protection. Follow the linked specification sheet and installation manual.
FAQ:
What electrical supply is required?
This product number is rated for 115V single-phase power and uses a NEMA 5-15 plug.
Does 14.9 GPM occur at maximum head?
No. Rated flow and maximum head are separate performance points.
Does it support Grundfos GO?
Yes. The SCALA1 platform supports compatible Bluetooth communication with the Grundfos GO app.
What older product number is referenced?
This listing identifies 96860172 as a replacement reference; confirm the entire application before substitution.
Why Buy From Big Frog Supply?
Big Frog Supply provides clear technical information, helpful support, and convenient online ordering for residential water-pressure systems.
