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SKU: 97530142
Grundfos CMB 3-46 Cast Iron Pressure Boosting Pump for Domestic Use with PM1 Controller
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
The Grundfos CMB 3-46 is a compact pressure boosting pump designed for domestic water supply and light commercial applications. It is supplied as a complete booster unit with an integrated PM1 pressure manager, enabling automatic operation based on system demand while protecting the pump from dry running.
The pump features a cast iron housing combined with multistage stainless steel impellers (AISI 304), delivering strength, corrosion resistance, and consistent hydraulic performance. The integrated non-return valve supports stable system operation and prevents backflow.
The pump operates at a rated flow of 3.1 m³/h with a corresponding head of 30.5 metres. Based on the performance curve, it delivers a maximum flow of approximately 70 L/min at low head conditions and achieves a maximum head of approximately 46 metres at shut-off. The unit is not self-priming and supports a maximum suction lift of 1 metre.
The unit is powered by a 0.5 kW electric motor operating on a 1 x 240 V, 50 Hz supply. The PM1 controller operates with a start pressure of 2.2 bar, ensuring consistent and automatic pressure boosting performance for residential systems.
FEATURES- Automatic Operation: PM1 controller enables demand-based start/stop for efficient system control
- Dry-Run Protection: Built-in protection prevents pump damage during water shortage conditions
- Self-Regulating Pressure System: Maintains consistent pressure without manual adjustment
- Compact Booster Design: Pre-assembled unit for quick installation and minimal setup time
- Non-Return Valve: Integrated check valve prevents backflow and maintains system pressure
- Multistage Hydraulic Design: Ensures smooth pressure delivery across varying demand levels
- Corrosion-Resistant Construction: Stainless steel wet-end components enhance durability
- Low Maintenance Operation: Simplified design reduces servicing requirements
- Quiet Performance: Designed for low noise operation in residential environments
- Plug-and-Play Installation: Ready-to-use system with minimal commissioning required
SPECIFICATIONS
| Max Flow | 70 L/Min |
| Max Head | 46 m |
| Power | 0.5 kW / 240v |
| Rated Current | 3.3 Amps |
| Suitable For | Household Boosting |
| Body Material | Cast Iron |
| Liquid Temperature | Maximum 40°C |
| Inlet Size | 25 mm |
| Outlet Size | 25 mm |
| Warranty | 24 Months |
Warranty & Returns
All products supplied by Foundation Pumps are covered by a minimum 12-month warranty unless otherwise stated. Some brands may offer longer manufacturer warranties. Warranty covers manufacturing defects, faulty materials and workmanship under normal use.
- Products must be installed correctly and in accordance with the manufacturer’s instructions.
- Warranty does not cover incorrect installation, misuse, dry running, normal wear and tear, unauthorised repairs or damage caused by external factors.
- Proof of purchase, photos, videos and installation details may be requested when assessing a warranty claim.
- The customer is responsible for returning the product to Foundation Pumps or the nominated service centre unless otherwise agreed.
- Removal, reinstallation, labour and associated site costs are generally the customer’s responsibility unless required under Australian Consumer Law.
- Change-of-mind returns may be accepted within 30 days provided the product is unused, uninstalled and returned in its original packaging.
- Customers are responsible for return freight costs for change-of-mind returns.
- Restocking fees may apply to special-order, bulky or non-stocked products.
- Used, installed or specially ordered products may not be eligible for change-of-mind returns.
- If a product arrives damaged or faulty, please contact Foundation Pumps as soon as possible so we can assist with the appropriate repair, replacement or refund.
Your rights under Australian Consumer Law are not affected.
How much water flow and vertical lift can I get from this pump?
Output across system pipework enables the Grundfos CMB 3-46 to deliver up to 70 L/Min in flow and a maximum head of 46 m, depending on your pipe layout.
What motor power rating and running current power this pump?
Under full load conditions, the motor in the CMB 3-46 delivers 0.5 kW on a 240v line drawing 3.3 Amps.
What materials are used to construct the pump casing and impeller?
Built with a resilient Cast Iron body, the CMB-3-46 maintains material durability against fluid abrasion and wear.
What materials protect the wetted parts against aggressive chemical attack?
High-grade high-grade alloy components in the CMB 3 46 protect internal passages against corrosive fluid contact.
How many years of warranty coverage come with this Grundfos pump?
Grundfos backs the CMB/3/46 with an official 2 Years warranty, offering reliable coverage and factory technical support.
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