Grundfos Home Booster
Grundfos 3.0 BAR home booster 240V MD300200
- Established 1975
- Trusted by thousands of customers
The Grundfos Home Booster MD300200 is a best-selling, complete, self-contained cold water boosting set for domestic properties with insufficient mains pressure. A Grundfos CM 3-4 stainless steel pump delivers 3.0 bar nominal pressure at 30 l/min, controlled by the PM2 Pressure Manager. The set includes an integral 200-litre storage tank (180 L usable) with a Type AB air gap, an 8-litre pressure vessel, and all-WRAS-approved components. Designed and built in the UK.
At 1,000 mm high on a 600 × 600 mm base (65 kg empty) it fits a utility room or garage on a solid level base; not suitable for lofts. Suitable for 1–2 standard bathrooms. For 3–4 occupants or a slow-filling mains, add the optional 180-litre slave tank. Choose the MD450200 for 4.5 bar.
More about this product
Product overview
The Grundfos 3.0 Bar Home Booster MD300200 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, providing 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. Supplied as a complete packaged unit requiring only mains cold water supply, discharge pipe, overflow pipe and electrical connections. At 1,000 mm high × 600 mm wide × 600 mm deep and 65 kg, it is typically installed in a utility room or garage on a solid, level base. Not suitable for loft installation.
Key features
Typical applications
Technical specifications
| Model / SKU | Grundfos Home Booster 3.0 Bar MD300200 |
| Pump | Grundfos CM 3-4 stainless steel, fixed speed |
| Nominal output pressure | 3.0 bar at 0.5 l/s (30 l/min) |
| Maximum duty | 1.2 l/s at up to 3.6 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 | 240 V single phase, 50 Hz |
| Motor | 588 W, full load current 2.8 A |
| Dimensions (H × W × D) | 1,000 × 600 × 600 mm |
| Weight | 65 kg (empty) |
| WRAS approved | Yes, all wetted components |
| Installation | Utility room or garage on a solid level base; not suitable for loft installation |
| Suitable for | 1–2 bathroom domestic properties |
How it compares
Three mains-connected booster systems available from Anglian Pumping Services, side by side.
| Feature | Grundfos 3.0 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 | 200 L (180 L usable) | 300 L | 480 L |
| Output pressure | 3.0 bar | Up to 6.5 bar | Up to 6.5 bar |
| Flow rate | 30 l/min @ 3.0 bar | 80 l/min @ 3 bar | 80 l/min @ 3 bar |
| Footprint | 600 × 600 mm, 1,000 mm high | 600 mm dia, 1,200 mm high | Modular Esytank |
| Pump type | Fixed speed | Variable speed (DAB Esybox) | Variable speed (DAB Esybox) |
| WiFi / app | No | Yes, DAB DConnect app | Yes, DAB DConnect app |
| Expandable tank | Yes, 180 L slave tank | No | Yes, modular on 3 sides |
| WRAS | Yes, all components | Tank and pump WRAS | Pump WRAS only |
Which should I choose? The Grundfos Home Booster 3.0 is the only direct-mains system here (Type AB air gap): a proven UK-built unit with a compact all-in-one footprint and no WiFi or smart features. The WaterBoost Slimline 300 EXT gives a larger 300 L tank, a variable speed DAB Esybox pump, 80 l/min and app control at the lowest price of the three. The DAB Esybox + Esytank has the largest storage and is the most expandable, for high-demand or slow-filling-mains properties.
Frequently asked questions
How big is it and where does it go?
1,000 mm high on a 600 × 600 mm base, 65 kg empty and around 245 kg with the tank full. It needs a solid, flat, level floor in a utility room or garage, with room to reach the float valve and controller. It is not suitable for lofts.
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.
What is the difference between this and the 4.5 bar model?
Output pressure and pump. The 3.0 bar model uses a CM 3-4 pump and delivers 3.0 bar at 30 l/min; the 4.5 bar model uses a CM 3-6 and delivers 4.5 bar at the same flow. Tank size, PM2 controller, pressure vessel, WRAS status, dimensions and installation requirements are identical. For most 1–2 bathroom properties 3.0 bar is sufficient; choose 4.5 bar for very low incoming mains or a specific appliance requirement.
Is 200 litres of storage enough?
For a 1–2 bathroom property with a reasonable mains fill rate, 200 litres (180 L usable) is typically sufficient. For 3–4 occupants or slow-filling mains, the optional 180-litre Grundfos slave tank brings total storage to 380 litres. For greater storage, the DAB Esybox with Esytank offers 480 litres.
What is the PM2 Pressure Manager?
The PM2 is Grundfos’s pressure controller. It starts the pump when a tap is opened and stops it when demand ceases, with LED indicators for pressure, pump status and faults, dry-run protection 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.
Is it suitable for a property with more than 2 bathrooms?
The Home Booster 3.0 is rated for 1–2 bathroom properties. For larger properties, the WaterBoost Slimline 300 EXT or DAB Esybox with Esytank deliver 80 l/min and suit higher simultaneous demand. Contact us if you’re unsure.
How is it delivered and what warranty is included?
It ships on a pallet as a complete packaged unit. Please contact us for delivery timescales and current warranty details on the Grundfos Home Booster range.
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.
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 Grundfos 3.0 BAR home booster 240V MD300200. 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 mains pressure boosting system?
A mains pressure boosting system increases the pressure and flow of water from the incoming mains supply into a property. It typically combines a pump and a storage or expansion tank, drawing water from the mains and delivering it to taps, showers and appliances at a stronger, more consistent pressure. They are used where the incoming mains is too weak to serve modern outlets reliably.
When do I need a mains booster pump?
You normally need a mains booster if static mains pressure is below 1.5 to 2 bar, if showers run weakly when other taps are open, or if combi boilers struggle to deliver hot water. Anglian Pumping recommends checking static pressure at the stop tap before specifying a system, then choosing a model rated for the number of bathrooms and outlets in the property.
What size mains booster do I need for my home?
Sizing depends on the number of bathrooms, the type of fittings and the static mains pressure. As a guide, a 1 to 2 bathroom property with combi boiler or single shower often needs 1.6 to 3 bar boost. A 2 to 3 bathroom property typically needs 3 to 4.5 bar with an integral break tank. Larger homes need a tank-and-pump system such as the DAB Esybox with Esytank or a Powertank set.
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.