DAB Esytank 300 with Esybox Mini3

Name: DAB Esytank 300 with Esybox Mini3
Brand: DAB Esybox
SKU: esytank300mini
Price: 969.6 GBP
Availability: InStock

DAB Esytank 300 with Esybox Mini3 - Image 2

DAB Esytank 300 with Esybox Mini3 - Image 3

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DAB Esytank 300 with Esybox Mini3 - Image 5

DAB Esytank 300 with Esybox Mini3 - Image 7

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Established 1975
Trusted by thousands of customers

The DAB Esytank 300 with Esybox Mini3 is a complete pressure boosting system pairing the WRAS-approved Esybox Mini3 variable-speed pump with a 275-litre useable HDPE storage tank. Designed for domestic and light commercial properties where mains pressure is low or mains flow is restricted, in a more compact footprint than the 500-litre version. Compact enough to fit through standard cellar doorways, with everything supplied for first-time installation.

275 L

useable capacity

45 l/min

flow at 3 bar

5.5 bar

max pressure

3 years

DAB warranty

✓
Complete system — Esybox Mini3 pump, Esytank 300 (275 L useable), Esydock, suction pipe, foot valve, delivery pipe, and float valve all included

✓
Up to 45 l/min at 3 bar — variable-speed inverter saves up to 50% energy versus fixed-speed alternatives

✓
Esybox Mini3 is WRAS approved — certified for potable drinking water; tank manufactured from food-grade HDPE

✓
Compact footprint — smaller tank than the Esytank 500, ideal where space is tighter

✓
Modular and expandable — auxiliary tanks couple on three sides; up to 4 Mini3 pumps can be linked for higher demand

✓
Easy maintenance — accessible top inspection lid; pump docks and undocks without tools

✓
3-year DAB manufacturer warranty when purchased from Anglian Pumping, an authorised distributor

Next Day delivery is now standard — order before 12pm for next working day delivery, Monday to Friday

Full Description

More about this product

Full Description

System overview

The DAB Esytank 300 with Esybox Mini3 is a complete, ready-to-install pressure boosting system pairing DAB’s award-winning Esybox Mini3 variable-speed pump with a 275-litre useable HDPE break tank. The smaller-tank version of the Esybox Mini3 system — same pump performance, more compact footprint, suited to properties with limited plant-room space.

Mains water fills the Esytank gradually through a float valve. The Esybox Mini3 then draws from the tank and delivers constant boosted pressure to every outlet on demand. The variable-speed inverter continuously adjusts to match real-time demand — DAB rate the energy saving at up to 50% compared with fixed-speed equivalents.

Supplied complete with Esydock, suction pipe with foot valve, delivery pipe, mains fill float valve, and overflow fitting. The Esybox Mini3 is WRAS approved for potable water; the Esytank is manufactured from food-grade HDPE. Backed by a 3-year DAB manufacturer warranty.

275^L

Useable capacity

45^l/min

Flow at 3 bar

5.5^bar

Max pressure

3^yr

DAB warranty

Esybox Mini3 WRAS approved — potable water

Why the tank? Why not just a pump?

The Esybox Mini3 cannot connect directly to the mains in installations where regulations require a break (Category 5 fluid category) between the mains supply and any installation that re-pressurises water. A break tank fulfils that requirement.

But the Esytank does more than just satisfy regulations — it acts as a reservoir, filling slowly during low-demand periods and holding 275 litres ready for peak draw. Even if your incoming mains delivers only a trickle, the system can still supply a power shower and washing machine simultaneously, because the pump is drawing from the tank, not waiting on the mains.

What’s included

DAB Esybox Mini3 booster pump

WRAS-approved variable-speed pump with built-in inverter, integrated expansion vessel, and pressure transducer with built-in temperature sensor. Up to 45 l/min at 3 bar working pressure. Mounted alongside the Esytank via the included Esydock connection.

DAB Esytank 300 storage tank

Food-grade HDPE drinking water tank with 275 litres useable capacity, mains fill float valve, overflow connection, suction pipe with foot valve, delivery pipe, and Esydock docking station. Modular design — expandable on three sides.

Pump performance curve

The chart shows the relationship between flow rate and head for the Esybox Mini3 pump. As demand increases, the variable-speed inverter increases output — but as with any pump, available pressure decreases as flow rises. The 45 l/min figure is the realistic working flow at 3 bar, the pressure most domestic systems are calibrated to.

DAB Esybox Mini3 pump curve — flow vs head. Maximum head 55 metres (5.5 bar) at zero flow, falling to zero head at maximum flow.

Indicative pump curve. Actual performance varies with installation conditions. Refer to the DAB data sheet for full performance data.

Key features

Variable speed inverter

Pump adjusts speed to match demand in real time — constant pressure, up to 50% energy saving versus fixed-speed systems.

275-litre useable storage

Stores water during low-demand periods, ensuring a reliable supply even when mains flow or pressure is restricted.

Mini3 WRAS approved

The Esybox Mini3 pump is certified for use with potable (drinking) water in the UK, fully compliant with water regulations.

Pressure transducer

Compact electronic pressure transducer with built-in temperature sensor — precise pressure regulation and integrated thermal protection.

Compact footprint

Smaller tank than the Esytank 500 — fits through standard cellar doorways and into tighter plant rooms or under-stair spaces.

Easy maintenance

Top-mounted inspection lid for routine tank inspection. The Mini3 docks and undocks without tools for straightforward servicing.

3-year DAB warranty

3-year manufacturer warranty direct from DAB when purchased from Anglian Pumping, an authorised distributor.

Expandable system

Modular tank design — couple auxiliary tanks on three sides to increase storage. Link up to 4 Mini3 pumps for higher demand.

Rapid installation

Supplied complete with all accessories — Esydock, suction pipe, foot valve, delivery pipe, and float valve. No extra fittings required.

Typical applications

Low mains pressure

Stores mains water and boosts it to a consistent, usable pressure throughout the property.

Low mains flow rate

Tank fills slowly during the day and provides a buffer reservoir for peak demand periods such as morning and evening.

Tight plant rooms

Where the Esytank 500 is too tall or too wide, the 300 fits in compact utility rooms, under-stair spaces, and converted cupboards.

Domestic homes — 2 to 3 bedrooms

The Mini3’s 45 l/min @ 3 bar capacity matches typical demand for households with 1–2 bathrooms in regular use.

Mains regulations compliance

Where regulations prohibit direct mains connection, the break tank arrangement ensures full compliance.

Rural and off-grid properties

Equally suitable as a buffer between a borehole, well, or intermittent mains supply and the property’s distribution.

How it compares

Three different approaches to pressure boosting in similar property sizes. The Esytank + Mini3 is the DAB-integrated solution; the WaterBoost Slimline 300 Mini3 uses the same pump with a UK-manufactured WRAS slimline tank in a slightly different format; the WaterBoost ATX-300 takes a fundamentally different approach — a sealed accumulator that connects directly to the mains, with no break tank or overflow.

Feature	Esytank 300 + Mini3	WB Slimline 300 Mini3	WB ATX-300
System type	Break tank + variable speed pump	Break tank + variable speed pump	Sealed direct-mains accumulator
Pump	DAB Esybox Mini3	DAB Esybox Mini3	Variable speed inverter
Storage capacity	275 L useable (HDPE)	300 L (WRAS slimline)	300 L sealed accumulator
Flow at 3 bar	45 l/min	45 l/min	27 l/min sustained / 45 l/min peak
Tank format	HDPE — food-grade, modular	WRAS slimline — UK manufactured	Sealed pressurised vessel — WRAS
Tank dimensions	590 × 810 × 1,170 mm	600 mm dia × 1200 mm h	Compact integrated unit
Mains connection	Via break tank float valve	Via break tank float valve	Direct to mains
Overflow required	Yes	Yes	No
Maintenance	Periodic tank inspection	Periodic tank inspection	Maintenance free — sealed
Best fit	DAB ecosystem buyer; modular expansion path	WRAS option for similar use	Direct-mains buyer; zero maintenance
Pump warranty	3 years	3 years	3 years
Tank warranty	Standard	5 years	5 years

Technical specifications

Esybox Mini3 pump

Maximum flow rate	75 l/min (4.5 m³/hour)
Working flow at 3 bar	45 l/min
Maximum head	55 metres
Maximum working pressure	5.5 bar
Power supply	230V / 50–60 Hz, single phase
Outlet connection	1″ BSP female
Expansion vessel	Integrated
Pressure transducer	Compact electronic — built-in temperature sensor
WRAS approval	Yes — pump only

Esytank 300 storage tank

Useable capacity	275 litres
Tank material	HDPE (food-grade polyethylene)
Dimensions (W × D × H)	590 × 810 × 1,170 mm
Weight (empty)	30 kg
Mains inlet connection	¾″ (max inlet pressure 6 bar)
Delivery pipe connection	1″
Overflow connection	DN 50
Maximum liquid temperature	40°C
Included accessories	Esydock, suction pipe with foot valve, delivery pipe, float valve, overflow fitting
Expandable	Yes — auxiliary tanks couple on 3 sides

!The Esybox Mini3 cannot connect directly to the mains. The Esytank is supplied from the mains water inlet (max 6 bar) with the pump drawing from the tank.

Frequently asked questions

What’s actually included in the box?

The system ships complete and ready to install. You receive the DAB Esybox Mini3 booster pump, the Esytank 300 (275 litres useable capacity), an Esydock docking station, suction pipe with foot valve, delivery pipe, mains fill float valve, and overflow fitting. No additional fittings are required to commission the system.

Should I get the Esytank 300 or the Esytank 500?

Both use the same Esybox Mini3 pump and deliver the same 45 l/min @ 3 bar. The difference is the tank: 275 L useable on the 300 vs 480 L useable on the 500. Choose the 300 if your plant room is tight or your peak demand is moderate; choose the 500 if you have multiple bathrooms running simultaneously or need more buffer storage when the mains is slow to refill. Contact us if you’d like help sizing.

What’s the difference between the Mini3 and the standard Esybox?

The Esybox Mini3 is a more compact pump rated at 45 l/min at 3 bar, suited to smaller homes and lower-demand applications. The standard Esybox is the larger flagship at 80 l/min at 3 bar, for higher-demand properties. If you have 3+ bathrooms running simultaneously or a 5+ bedroom home, the standard Esybox version is the better fit. Contact us if you’d like help sizing.

Why is it called the Esytank 300 if the useable capacity is 275 litres?

The “300” is DAB’s product designation. The actual useable capacity is 275 litres once the float valve, overflow level, and inlet/outlet allowances are accounted for. We use 275 L in technical specifications and sizing calculations to give you an accurate working figure.

Why do I need a tank — can’t I just use the pump on its own?

The Esybox Mini3 cannot connect directly to the mains in most installations — UK water regulations require a break tank to prevent backflow contamination, and the Esytank fulfils that role. It also stores 275 litres of water, so the system can deliver high flow rates during peak demand even if your mains supply is slow. If your mains pressure and flow are already adequate and you only need pressure boosting, contact us for advice on a pump-only alternative.

Where can I install it?

The system is designed for indoor fixed installation — typically a utility room, cellar, garage, or plant room. The compact tank is dimensioned to fit through standard cellar doorways and into tight spaces such as under-stair cupboards. Outdoor installation requires the optional DAB Esycover kit.

Is 275 litres enough for my property?

For most domestic properties up to three bedrooms with 1–2 bathrooms in regular use, 275 litres is sufficient provided the mains can refill the tank between peak demand periods. If you regularly have multiple showers or baths running simultaneously, the Esytank 500 (480 L useable) is the better choice. Alternatively, the WaterBoost Slimline 300 offers a similar capacity in a slimmer footprint with a 5-year tank warranty. Contact us for help sizing.

Is the Mini3 WRAS approved for drinking water?

Yes — the Esybox Mini3 is WRAS approved, confirming it is safe and legal for potable water in the UK. The Esytank is manufactured from food-grade HDPE and is suitable for drinking water storage, but does not hold its own WRAS approval. Where a fully WRAS-approved tank is required by specification, the WaterBoost Slimline or Advant ranges offer UK-manufactured WRAS alternatives.

What warranty is included?

3 years manufacturer warranty direct from DAB when purchased from Anglian Pumping, an authorised DAB distributor.

Can I expand the system in future?

Yes. The tank is fully modular — additional Esytank auxiliary cisterns can be coupled on any of three sides. For higher flow demand, up to four Esybox Mini3 pumps can be linked wirelessly and will share the load automatically. Contact us to discuss expansion options.

Downloads

Data Sheet - Esytank PDF
Download
Data Sheet - Mini3 PDF
Download

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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Frequently Asked Questions

Quick answers to common questions about the DAB Esytank 300 with Esybox Mini3. 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.

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