WaterBoost - Grand 5000L Esybox MAX 45-120M 2705G710

Name: WaterBoost - Grand 5000L Esybox MAX 45-120M 2705G710
Brand: WaterBoost
SKU: waterboostGrand5000Lmax45120M
Price: 7638 GBP
Availability: InStock

WaterBoost - Grand 5000L Esybox MAX 45-120M 2705G710 - Image 2

WaterBoost - Grand 5000L Esybox MAX 45-120M 2705G710 - Image 3

WaterBoost - Grand 5000L Esybox MAX 45-120M 2705G710 - Image 4

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Established 1975
Trusted by thousands of customers

A 5,000 litre slimline break tank paired with a twin DAB Esybox MAX 45/120 M booster set on a 2 Esydock MAX base. The flagship of the Grand range — five tonnes of stored water and commercial-grade flow, all running from an ordinary 230 V single-phase supply.

58 m

Max head / 5.7 bar

480 L/min

Max flow

1250 mm

Tank width

230 V

Single phase

5,000 litres of buffer — enough to ride out a full day of commercial demand on a slow-filling main.
58 m constant head held flat to 160 L/min — steady pressure right across normal simultaneous demand.
9.4 A per pump against 12.5 A on the 60/120 M — commercial-scale storage without a commercial-scale electrical upgrade.
Duty/standby plus duty-assist — the second pump joins automatically when demand calls for it, and duty rotates so wear is shared.
DConnect Wi-Fi built in, with Modbus and BMS interfacing available via the optional esy I/O module.

Part no. 2705G710
Established 1975
UK stock
Fast dispatch

Full Description

More about this product

Full Description

Overview

The WaterBoost Grand 5000 Esybox MAX 45/120 M is the flagship of the Grand range: a 5,000 litre Enduramaxx slimline tank feeding a twin DAB Esybox MAX 45/120 M booster set mounted on a 2 Esydock MAX base.

Stored water is what makes the system work. Rather than drawing straight from a main that may only manage 20–30 litres a minute, the building draws from a five-tonne reservoir that refills quietly in the background. Peak demand is met from storage; the incoming main only has to keep pace with average consumption over the day.

At this capacity the buffer stops being a smoothing device and becomes genuine resilience. Five thousand litres will carry a small hotel through a full morning of showers, or a care home through a laundry cycle and a lunch service, without the incoming main ever being the limiting factor. It also gives you a real margin if the main is interrupted.

What is unusual is the electrical side. Storage at this scale normally arrives with a three-phase booster set attached. The 45/120 M runs on an ordinary 230 V single-phase supply at 9.4 A per pump — a third less current than the 60/120 M. You give up some pressure ceiling — 5.7 bar rather than 6.7 bar — in exchange for commercial-scale storage on a supply the building already has.

Why this system

Commercial storage, domestic supply

5,000 litres of buffer on 1 × 208–240 V at 9.4 A per pump. No three-phase provision, no transformer, no supply upgrade.

Resilience, not just smoothing

Five tonnes gives a genuine margin if the incoming main is interrupted, rather than simply flattening the morning peak.

Pressure that holds under load

58 m stays flat all the way to 160 L/min, so many outlets can run at once without the pressure sagging.

Two pumps, shared duty

Duty rotates between the pair, and the second joins in duty-assist on heavy demand. Either pump can carry the system alone if the other is down.

Genuinely quiet

63 dB(A) at one metre from water-cooled permanent-magnet motors — suitable for a plant room next to occupied spaces.

Connected as standard

DConnect Wi-Fi is built in for remote pressure setting, alarms and consumption history. Modbus and BMS via the optional esy I/O module.

Performance

Published DAB duty points for the 2 Esybox MAX 45/120 M set. Curve tolerance to ISO 9906.

Flow (L/min)	80	160	200	240	280	320	360	480
Head (m)	58	58	52	45	38.5	32.3	26	7
Pressure (bar)	5.7	5.7	5.1	4.4	3.8	3.2	2.5	0.7

Reading the curve in practice. Interpolating the published points, the set delivers roughly 330 L/min at 3 bar, 265 L/min at 4 bar and 205 L/min at 5 bar. The headline 480 L/min occurs at only 7 m of head, so always size against the pressure you actually need at the outlet rather than the maximum flow figure. Pump performance is identical across the Grand 2000, 3000 and 5000 — what changes between them is stored volume, not flow.

Tank specification

Enduramaxx 5,000 L slimline
Nominal capacity	5,000 litres
Dimensions (L × W × H)	2850 × 1250 × 2076 mm
Outlet	2″ BSP
Lid	455 mm vented
Overflow	Moulded hoods
Material	Polyethylene, UK moulded
Filled weight (approx.)	5,050 kg
Guarantee	10 years

Pump set specification

2 × DAB Esybox MAX 45/120 M
Maximum head	58 m (5.7 bar differential)
Maximum flow	480 L/min (28.8 m³/h)
Constant pressure range	1–12 bar (3 bar factory default)
Power input P1	2 × 1.97 kW
Nominal current	2 × 9.4 A
Supply	1 × 208–240 V, 50/60 Hz
Nominal pressure PN	12 bar
Maximum inlet pressure	5 bar
Connections	2″ suction & delivery
Protection / insulation	IP X5 / Class F
Fluid / ambient temperature	50 °C / 55 °C maximum
Sound pressure	63 dB(A) at 1 m, free field
Set dimensions	811 × 526 × 766 mm
Set weight	76 kg
DAB part codes	60217358 × 2, 60198332 (dock)

What’s included & who it suits

What’s included

Enduramaxx 5,000 L slimline tank
455 mm vented, lockable lid
Moulded overflow hoods
2 × DAB Esybox MAX 45/120 M
2 Esydock MAX twin base with stainless manifold
Integral 2 L expansion vessel per pump
Non-return valve on each delivery

Ideal for

Hotels, care homes and large guest houses
Multi-tenant blocks and mixed-use developments
Schools, community and leisure buildings
Farms, equestrian yards and rural estates
Sites on a severely restricted or slow-filling main
Commercial and industrial sites with no three-phase

Installation notes

Before you specify
DAB list the Esybox MAX certifications (NSF61, WRAS and ACS) as pending approval in their published catalogues — please confirm current WRAS status with us before specifying for a potable installation. WRAS and Byelaw 30 status for the 5,000 L Enduramaxx slimline tank is likewise to be confirmed. All work must comply with the Water Supply (Water Fittings) Regulations 1999 and BS EN 806.

At roughly 5,050 kg full, this tank requires a properly engineered base pad designed for the load — this is a structural consideration, not a matter of levelling slabs. Allow a minimum 1,300 mm access opening and survey the full route before ordering. Delivery is on the pallet network and offloading facilities are required at site. The electrical supply must be sized for the combined 2 × 9.4 A load and installed by a qualified electrician.

Frequently asked questions

Is the Grand 5000 more powerful than the 2000 or 3000?

No — all three use the identical twin Esybox MAX 45/120 M set, so flow and pressure are the same across the range. What you gain is stored volume: 5,000 litres holds out far longer at peak demand before the system depends on the incoming main keeping up.

Should I choose the 45/120 M or the 60/120 M at this size?

It comes down to head, not capacity. The 60/120 M gives 6.7 bar against 5.7 bar and draws 12.5 A per pump instead of 9.4 A. If you are lifting to four or more storeys, or feeding long horizontal runs, take the 60/120 M. For low-rise buildings with substantial demand — which is most care homes, schools and single-storey commercial sites — the 45/120 M covers it on a much easier supply.

Do I need a three-phase supply?

No. This variant is single-phase throughout, 1 × 208–240 V — which is the main reason to choose it at this capacity. If you do have three-phase available, the 45/120 T version draws only 3.4 A per pump; ask us about it.

Can it really deliver 480 litres a minute?

Only at 7 m of head, which is not a useful working point for most installations. Size against pressure: expect around 330 L/min at 3 bar, 265 L/min at 4 bar and 205 L/min at 5 bar. Those are the numbers to design with.

What base does a 5,000 litre tank need?

Full, it weighs a little over five tonnes across a 2850 × 1250 mm footprint. That needs a purpose-designed reinforced pad, not an existing yard slab or garage floor. If you are unsure, send us the site details and we will advise before you order.

How long does the tank take to refill?

That depends entirely on your incoming main. At 20 L/min a full 5,000 litre tank takes around four hours; at 30 L/min, closer to three. In practice the tank tops up continuously rather than refilling from empty.

How is it delivered?

Tank and pump set ship as separate items on the pallet network. Offloading facilities are required at site for a tank of this size — please confirm you have suitable plant or a forklift available before the delivery date.

Part no. 2705G710
Established 1975
UK stock
Fast dispatch
10 year tank guarantee

Downloads

data sheet 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.

Frequently Asked Questions

Quick answers to common questions about the WaterBoost – Grand 5000L Esybox MAX 45-120M 2705G710. 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.