Name: Grundfos 4.5 BAR Home Booster 240V MD450200
Brand: Grundfos
SKU: md450200
Price: 1786.8 GBP
Availability: InStock

Grundfos 4.5 BAR Home Booster 240V MD450200 - Image 2

Grundfos 4.5 BAR Home Booster 240V MD450200 - Image 3

In stock

Established 1975
Trusted by thousands of customers

The Grundfos Home Booster MD450200 is a best-selling, complete, self-contained cold water boosting set designed for domestic properties with low mains pressure. A high-quality stainless steel pump delivers 4.5 bar nominal pressure (up to 5.6 bar maximum), controlled by the PM2 Pressure Manager on/off controller. The set includes an integral 200-litre storage tank (180L useable) with a Type AB air gap, an 8-litre integral pressure vessel, and all WRAS-approved components. Designed and built in the UK.

The PM2 controller provides pressure, pump status, and fault indicators with a reset button, and protects the pump against dry-run, air-lock, and seizure. The 8-litre pressure vessel maintains pressure between pump cycles to prevent unnecessary motor starts. For homes with 4–5 occupants or a slow-filling mains supply, an optional 180-litre slave tank is available to increase storage capacity.

Suitable for 1–2 standard bathrooms with typical fittings. Arrives as a packaged unit ready for installation — mains cold water connection, overflow, discharge pipe, and electrical supply required. Recommended for utility room or garage installation on a solid level base.

4.5bar

Nominal

200L

Integrated tank

Pressure vessel

Built · WRAS

WRAS approved
UK manufactured
PM2 controller
Type AB air gap
Stainless steel pump
Slave tank available

Full Description

More about this product

Full Description

Product overview

The Grundfos 4.5 Bar Home Booster MD450200 is a self-contained cold water boosting system designed for domestic properties with low or inadequate mains pressure. It connects directly to the mains supply via a Type AB air gap — which provides compliant backflow protection — and fills an integrated 200-litre storage tank from which the pump draws. No separate break tank is required.

The Grundfos PM2 Pressure Manager controller automatically starts and stops the pump on demand. An integrated 8-litre pressure vessel prevents short-cycling on small draw-offs. The system is suitable for properties with 1–2 bathrooms and typical household fittings.

Designed and built in the UK specifically for the domestic market, with a proven 10-year track record. Installation requires only connection of mains cold water supply, discharge pipe, overflow pipe, and electrical supply. Typically installed in a utility room or garage on a solid, level base.

4.5^bar

Output pressure

200^L

Integrated tank

30^l/min

Flow @ 4.5 bar

5.6^bar

Max working pressure

WRAS approved — all wetted components

Key features

4.5 bar pressure output

Delivers 4.5 bar at 30 l/min — one of the highest output pressures of any domestic packaged booster system. Max working pressure 5.6 bar.

Direct mains connection

Connects directly to mains via a Type AB air gap — providing compliant backflow protection without needing a separate break tank.

Integrated 200-litre tank

200-litre cold water storage tank (180L usable) with float valve. Fills from the mains and provides a buffer for peak demand.

PM2 Pressure Manager

Grundfos PM2 controller handles automatic start/stop, pressure and fault indication, dry-run protection, and anti-seize function.

Stainless steel pump

Grundfos CM3-6 I stainless steel pump — high efficiency, sustained performance, long service life, and quiet operation.

8-litre pressure vessel

Integrated 8-litre pressure vessel maintains pressure on small draw-offs, preventing unnecessary pump starts and reducing wear.

WRAS approved components

All wetted components WRAS approved in accordance with Water Byelaws regulations.

UK built — ready to install

Designed and built in the UK for the domestic market. Supplied as a complete packaged unit — just connect mains supply, overflow, discharge pipe, and power.

Expandable capacity

Optional 180-litre slave tank can be added for properties with 4–5 occupants or slow-filling mains, increasing total storage to 380 litres.

Typical applications

1–2 bathroom homes with low mains pressure

The ideal application — a typical domestic property where mains pressure is inadequate for pressurised hot and cold systems.

Unvented hot water cylinders

Provides the high pressure required for unvented cylinders to operate safely and efficiently.

Combination boilers

Ensures combi boilers receive sufficient incoming pressure for hot water and heating performance.

Electric and mixer showers

Delivers high-pressure supply to electric showers, mixer showers, and thermostatic valves.

Low mains flow rate

The storage tank fills slowly during off-peak periods and provides a buffer for peak morning and evening demand.

Water Byelaws compliance

Where regulations require backflow protection on direct mains boosting, the Type AB air gap ensures full compliance.

Technical specifications

Model / SKU	Grundfos Home Booster 4.5 Bar MD450200
Pump	Grundfos CM3-6 I stainless steel — fixed speed
Nominal output pressure	4.5 bar at 0.5 l/s (30 l/min)
Maximum working pressure	5.6 bar
Tank capacity	200 litres (180 litres usable)
Pressure vessel	8 litres integrated
Controller	Grundfos PM2 Pressure Manager
Mains connection	Direct mains — Type AB air gap with float valve
Power supply	240V single phase
WRAS approved	Yes — all wetted components
Installation	Utility room or garage — solid level base; not suitable for loft installation
Suitable for	1–2 bathroom domestic properties
Price	£1,550.00 + VAT (£1,860.00 inc VAT)

!Not suitable for installation in a loft or attic space. Must be installed on a solid, flat, level surface in a utility room or garage.

How it compares

Three mains-connected booster systems available from Anglian Pumping Services — compared side by side.

Feature	Grundfos 4.5 Bar this product	WaterBoost Slimline 300 EXT	DAB Esybox + Esytank
Mains connection	Direct — Type AB air gap	Indirect — break tank fed	Indirect — break tank fed
Tank capacity	200L (180L usable)	300L	480L
Output pressure	4.5 bar	Up to 6.5 bar	Up to 6.5 bar
Flow rate	30 l/min @ 4.5 bar	80 l/min @ 3 bar	80 l/min @ 3 bar
Pump type	Fixed speed	Variable speed (DAB Esybox)	Variable speed (DAB Esybox)
WiFi / app	No	Yes — DAB H2D app	Yes — DAB H2D app
Voice control	No	Google & Alexa	Google & Alexa
Expandable tank	Yes — 180L slave tank	No	Yes — modular on 3 sides
WRAS	Yes — all components	Tank + pump WRAS	Pump WRAS only
Price (ex VAT)	£1,550.00	£1,019.00	£1,380.00

Which should I choose?
Grundfos Home Booster 4.5 — the only system here that connects directly to the mains (via Type AB air gap). Best if high output pressure (4.5 bar) is the priority and you have a 1–2 bathroom property. Proven UK-built design with no need for a separate break tank. No WiFi or smart features.
WaterBoost Slimline 300 EXT — best value with a larger 300L tank, variable speed DAB Esybox pump, higher flow rate (80 l/min), WiFi and voice control — at the lowest price of the three.
DAB Esybox + Esytank — largest storage (480L), most expandable, same DAB Esybox pump performance. Best for high-demand properties or slow-filling mains supply.

Frequently asked questions

How much does it cost and how is it delivered?

£1,550.00 + VAT (£1,860.00 inc VAT). Please contact us via WhatsApp or phone for delivery timescales on this product.

Does it connect directly to the mains?

Yes — the mains supply connects directly to the unit. A Type AB air gap built into the tank inlet provides the backflow protection required under Water Byelaws regulations. No separate break tank is needed.

Is 200 litres of storage enough?

For a 1–2 bathroom property with a reasonable mains fill rate, 200 litres (180L usable) is typically sufficient. For 4–5 occupants or slow-filling mains, the optional 180-litre Grundfos slave tank can be added to bring total storage to 380 litres. If you need more than 380 litres, the DAB Esybox with Esytank offers 480 litres of expandable storage.

What is the PM2 Pressure Manager?

The PM2 is Grundfos’s pressure controller. It automatically starts the pump when a tap is opened and stops it when demand ceases. It also provides LED indicators for pressure, pump status, and faults; dry-run protection (shuts down if the tank runs dry); a reset button; and an anti-seize function that exercises the pump if it has not run for an extended period.

What is the difference between this and a variable speed system?

The Grundfos uses a fixed speed pump with PM2 on/off control — it runs at full speed or not at all. Variable speed systems like the DAB Esybox continuously adjust motor speed to match demand, delivering more consistent pressure, lower energy use, and less wear. The Grundfos trades these benefits for a higher nominal output pressure (4.5 bar), a compact all-in-one footprint, and the simplicity of direct mains connection with no additional plumbing required.

Where can it be installed?

The Home Booster must be installed on a solid, flat, level base — typically a utility room or garage. It is not suitable for loft or attic installation. Connection requires mains cold water supply, discharge pipe, overflow pipe, and a 240V electrical supply.

Is it suitable for a larger property?

The Home Booster 4.5 is rated for 1–2 bathroom properties. Its flow rate of 30 l/min at 4.5 bar may not sustain high simultaneous demand. For larger properties, consider the DAB Esybox with Esytank or the WaterBoost Slimline 300 EXT, both delivering 80 l/min. Contact us if you’re unsure.

What warranty is included?

Please contact us for current warranty details on the Grundfos Home Booster range.

Additional Information

The Grundfos Home Booster has been developed to provide a compact and cost-effective solution. It’s is self-contained and its neat size makes it ideal for a range of domestic installations where space is at a premium.

These self-contained cold water booster sets, has been specifically designed for domestic properties where the existing mains water supply is insufficient to meet the demand requirements of pressurised hot and cold water systems. The Home Booster is suitable for most domestic properties with one or two standard bathrooms with standard fittings, or en-suite, and cloakroom, plus other normal household appliances.

Designed and developed by Grundfos Pumps specifically to meet the demands of the UK market, these Home Booster units are built in the UK and they have proven themselves in the field for the past 10 years.

Another important plus is that installation is straight forward – just requiring connection of mains cold water supply, discharge pipe, overflow pipe and electrical connections. Sets are typically installed in a utility room or a garage. For larger properties, there are a range of alternatives that could be considered including the Grundfos Max-E Boost.

With the increasing demand for water to meet a range of demands, many households are looking to get a boost to their water supply demands and the Grundfos Home Booster can deliver it.

Downloads

manual PDF
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brochure PDF
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Delivery Information

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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