Calpeda IMAT 2MXH Twin Pump Booster Set
Calpeda IMAT 2MXH1604/A-TTB-24 Twin Pump Booster Set U81004300000
- Established 1975
- Trusted by thousands of customers
Calpeda IMAT 2MXH1604/A-TTB-24 is a Calpeda twin-pump variable-speed booster set with two MXH 1604 horizontal multi-stage pumps under I-MAT 11,2 TT-B frequency-converter control, part number U81004300000. Each pump gives up to 417 l/min (25 m³/h) and up to 48 m (4.7 bar) at full speed.
I-MAT is Calpeda's frequency converter for water supply and hot and cold water distribution: it varies pump speed to hold the set pressure, temperature or flow, and protects the pumps against dry running, closed ports and supply faults. Calpeda lists these sets for a 400 V three-phase 50 Hz supply.
More about this product
Calpeda IMAT 2MXH1604/A-TTB-24 overview
Calpeda IMAT 2MXH1604/A-TTB-24 is a Calpeda twin-pump variable-speed booster set with two MXH 1604 horizontal multi-stage pumps under I-MAT 11,2 TT-B frequency-converter control, part number U81004300000. Each pump gives up to 417 l/min (25 m³/h) and up to 48 m (4.7 bar) at full speed.
I-MAT is Calpeda's frequency converter for water supply and hot and cold water distribution: it varies pump speed to hold the set pressure, temperature or flow, and protects the pumps against dry running, closed ports and supply faults. Calpeda lists these sets for a 400 V three-phase 50 Hz supply.
Specifications
| Model | Calpeda IMAT 2MXH1604/A-TTB-24 |
|---|---|
| Calpeda part number | U81004300000 |
| Pumps | 2 × Calpeda MXH 1604 (data sheet model MXH 1604/A) |
| Motor power | 2 × 3 kW (Calpeda 2025 price list) |
| Supply | Three-phase 400 V 50 Hz (Calpeda 2025 price list) |
| Frequency converter | I-MAT 11,2 TT-B: max. output current 11.2 A, typical motor power 2.2–4 kW |
| I-MAT input voltage | 3~ 380 V -10% to 480 V +5%, 50-60 Hz |
| I-MAT protection | IP55, max. ambient 50 °C |
| Max. flow per pump | 417 l/min (25 m³/h) at 14 m |
| Max. head | 48 m (4.7 bar) |
| Pump liquid temperature | -15 °C to +110 °C |
Performance (per pump, full speed)
Total head at each flow for one MXH 1604/A pump at approx. 2900 rpm, from the Calpeda MXH 50 Hz data sheet.
| Flow (l/min) | Flow (m³/h) | Head (m) | Pressure (bar) |
|---|---|---|---|
| 0 (shut-off) | 0 | 48 | 4.7 |
| 83.3 | 5 | 46.5 | 4.6 |
| 133 | 8 | 44.5 | 4.4 |
| 183 | 11 | 41.5 | 4.1 |
| 233 | 14 | 38 | 3.7 |
| 267 | 16 | 36 | 3.5 |
| 300 | 18 | 33 | 3.2 |
| 333 | 20 | 29 | 2.8 |
| 367 | 22 | 23 | 2.3 |
| 417 | 25 | 14 | 1.4 |
I-MAT features
- I-MAT frequency converter for automatic pump control
- Operating modes: constant pressure, proportional pressure, constant temperature, constant flow, fixed speed, optional night mode
- Pump protection against dry running, closed ports, motor overcurrent, supply over/undervoltage and unbalanced or missing phases
- High-efficiency heatsink with integrated fans cools the converter independently of the motor
- Separate signal and power terminal areas
- Removable IP55 control panel with LCD display, can be mounted remotely
- Cascade control (with optional card) of up to 6 variable-speed and 5 fixed-speed pumps
Pump construction
- One-piece horizontal multi-stage construction in chrome-nickel steel AISI 304
- Single-piece barrel casing: front suction above the pump axis, radial delivery at the top
- Compact lantern bracket and motor with feet
Pump materials
| Component | Material |
|---|---|
| Pump casing, stage casings, impellers | Chrome-nickel steel 1.4301 EN 10088 (AISI 304) |
| Wear ring | PPS |
| Pump shaft | Steel 1.4305 EN 10088 (AISI 303) |
| Mechanical seal | Ceramic alumina / carbon / EPDM, seat to ISO 3069 |
Applications
- Water supply and pressure boosting
- Water transport and distribution
- Production and distribution of hot and cold water
- Water treatment
Frequently asked questions
Technical data: Calpeda I-MAT and MXH data sheets (50 Hz) and Calpeda 2025 price list.
Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.
Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).
Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.
Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.
Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.
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Frequently Asked Questions
Quick answers to common questions about the Calpeda IMAT 2MXH1604/A-TTB-24 Twin Pump Booster Set U81004300000. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.
What is a water booster pump?
A water booster pump increases the pressure of an existing water supply to give stronger flow at taps, showers and appliances. It can be a small inline pump fitted to the incoming mains, or a larger pump and tank set that draws from a break tank to feed the whole house. Boosters do not create water – they raise the pressure of the water already coming in.
What is the difference between an inline booster and a tank-and-pump booster?
An inline booster connects straight onto the incoming mains and is limited to 12 litres per minute under UK water regulations – examples include the Salamander HomeBoost and WaterBoost WB-Compact. A tank-and-pump booster, such as the Grundfos Home Booster or DAB Esybox with Esytank, draws from a break tank and can deliver much higher flow rates for larger homes with multiple bathrooms.
What is a variable speed booster pump?
A variable speed booster uses an inverter to adjust pump speed in real time to match demand. It maintains constant pressure as outlets open and close, runs more quietly than a fixed-speed pump and typically saves up to 50 per cent of the energy a fixed-speed equivalent would use. The DAB Esybox, DAB Esybox Mini 3 and Grundfos Scala2 are common variable speed examples.
What does a water booster pump do?
A water booster pump raises water pressure to help supply taps, showers and other outlets when the existing system cannot meet demand.
Can a booster pump connect directly to the water mains?
Not every booster can. Direct connection depends on the product design and applicable water regulations; some systems require a break tank.
How do I size a water booster pump?
Assess simultaneous flow demand, required outlet pressure, available inlet conditions and the pressure losses in the pipework.
What types of Calpeda pumps can I explore?
Calpeda produces pumps for water supply, pressure boosting, drainage and circulation. Choose a model according to the required flow, head and liquid.
Are Calpeda pumps suitable for commercial installations?
Yes. Calpeda offers pump ranges for domestic, commercial and industrial duties; suitability depends on the individual model and duty point.
How do I choose a replacement Calpeda pump?
Check the existing pump model, supply voltage, connection dimensions, flow rate and required head before selecting a replacement.