WaterBoost WB – Advant 2000 slim Esybox Twin 2104410DSL

Name: WaterBoost WB – Advant 2000 slim Esybox Twin 2104410DSL
Brand: WaterBoost
SKU: WBK2000esyboxtwinsl
Price: 3853.82 GBP
Availability: InStock

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Established 1975
Trusted by thousands of customers

The WaterBoost WB-Advant Slim 2000 Esybox Twin is the flagship of the Slim range — combining two 1000-litre WRAS-approved UK-manufactured slimline tanks (each 600mm W × 1250mm L × 1703mm H) with two DAB Esybox pumps in a coordinated Duty/Assist configuration. Delivers 140 l/min at 3 bar combined, up to 6.5 bar maximum, with H2D wireless load balancing, WiFi, DConnect app, Google Home and Alexa voice control.

Both tanks are just 600mm wide — each passes through a standard doorway with 162mm to spare, giving you 2000L of storage and dual-pump redundancy in installations no standard-footprint tank can reach. Install the tanks side-by-side, end-to-end, or in separate rooms linked by pipework. The two Esybox pumps communicate wirelessly via H2D technology — balancing load, engaging together at peak demand, and providing true duty/standby operation. Both run at 43 dB(A) each. Stainless steel twin-pump frame and all interconnecting pipework included.

Each UK-manufactured tank carries an outstanding 10-year warranty and each DAB Esybox a 3-year warranty. Delivery is typically 1–2 working days.

140l/min

@ 3 bar

2000L

Tank storage

600mm

Slim width

10yr

Tank warranty

Twin-tank flexibility
Dual pump redundancy
WiFi · H2D · Google · Alexa
WRAS tanks & pumps
6.5 bar max
43 dB(A) per pump
10yr warranty each tank
1–2 day delivery

Full Description

More about this product

Full Description

Product overview

The WaterBoost WB-Advant Slim 2000 Esybox Twin is the flagship of the Slim range — a maximum-capacity, maximum-flow slimline boosting system combining two 1000-litre WRAS-approved slimline storage tanks with two DAB Esybox variable speed pumps in a coordinated Duty/Assist configuration. It is engineered for very large domestic properties, small commercial premises, and light HMO installations where you need everything: high flow, dual-pump redundancy, an extended 2000L buffer — but the plant room, utility, or install route still won’t take a wider tank.

Both tanks are just 600mm wide, so each passes through a standard 762mm internal doorway with 162mm to spare. That opens up flexible installation options no monolithic 2000L twin can offer: side-by-side (1200mm wide), end-to-end (2500mm long), or in separate spaces linked by pipework. The two Esybox pumps communicate wirelessly via DAB H2D technology, delivering combined 140 l/min at 3 bar up to 6.5 bar maximum — automatically balancing load, engaging both together at peak demand, and providing true duty/standby redundancy if one pump is removed for service.

Each UK-manufactured tank carries a 10-year warranty and each DAB Esybox a 3-year manufacturer warranty. WiFi via the DConnect app allows remote monitoring; Google Home and Amazon Alexa voice control are supported. Delivery is typically 1–2 working days.

2000^L

Combined storage

140^l/min

Combined flow

600^mm

Slim width per tank

43^dB

Per pump at 1m

Tanks WRAS approved · Pumps WRAS approved

What’s included

2 × DAB Esybox booster pumps

Two variable speed pumps delivering combined 140 l/min at 3 bar, 6.5 bar max working pressure. Duty/Assist configuration via H2D wireless. Built-in inverter, 2-litre expansion vessel each, WiFi (DConnect app), 43 dB(A). 3-year DAB warranty each. Pre-fitted with plugs.

2 × 1000-litre Advant slimline storage tanks

Two WRAS-approved 1000-litre vertical baffled slimline Advant tanks — each 600mm W × 1250mm L × 1703mm H. Each pre-fitted with By-law 30 kit and ¾” ball float valve. UK manufactured, 100% rust-proof, 10-year tank warranty each. Tank-to-tank connection kit, stainless steel twin-pump mounting frame, and all interconnecting PVC pipework included.

Key features

2000L buffer — slim access

Twice the water reserve of the 1000L Slim Twin, in an installation format that still fits through a standard doorway. Each 600mm-wide tank clears 762mm doorways with 162mm to spare.

Flexible installation options

Side-by-side (1200mm), end-to-end (2500mm), or split between two rooms linked by pipework. Choose whichever configuration fits the space you have.

Dual pump — 140 l/min @ 3 bar

Two DAB Esybox pumps deliver combined 140 l/min at 3 bar. Variable speed adjusts output to match demand at every outlet, with up to 50% energy saving vs fixed-speed equivalents.

H2D wireless Duty/Assist

The two Esybox pumps communicate wirelessly via DAB H2D technology — automatically balancing load, engaging both together at peak demand, providing true duty/standby fallback.

True redundancy

If one pump fails or is removed for service, the remaining pump continues without interruption. Water supply is never lost during maintenance — critical for tenants, guests, and B&B operations.

WiFi and voice control

DAB DConnect app for remote monitoring and pressure adjustment. Google Home and Amazon Alexa compatible — say “Hey Google, power shower” or “sleep mode” to boost or quieten.

43 dB(A) per pump — whisper quiet

Water-cooled motors in sound-absorbing housings. Quiet enough for plant rooms close to living areas, even with both pumps running.

External pumps — easy servicing

Both Esybox units sit alongside the tanks on a stainless steel mounting frame — fully accessible for inspection, adjustment, or independent replacement without disturbing the tanks.

Extended peak capacity

The 2000L buffer covers around 14 minutes of continuous peak demand at combined 140 l/min before refill from mains — essential for large properties or extended peak windows.

Typical applications

Very large domestic properties

6+ bedroom homes, multi-family properties, or large country houses with high simultaneous demand and restricted plant room access.

B&Bs, guesthouses & small hotels

Where dual-pump redundancy protects guest experience and 2000L buffer covers extended peak morning demand across multiple rooms.

Light commercial & HMO

Where redundancy matters for tenant experience and a full 2000L buffer covers peak demand periods across multiple bathrooms.

Off-grid & borehole installations

Where mains is limited or absent — 2000L reserve plus dual-pump redundancy provides extended autonomy and continuous supply.

Slow-filling mains supply

Where the mains cannot refill fast enough for extended peak use — 2000L gives you the reserve to bridge slow refill periods without service interruption.

Split-room installations

Where no single space can house 2000L of tank, the two tanks can be installed in separate rooms and linked by pipework.

Technical specifications

Pump set — 2 × Esybox

Combined flow rate	140 l/min @ 3 bar
Max pressure	6.5 bar
Configuration	Duty/Assist — H2D wireless
Noise	43 dB(A) per pump at 1m
Connectivity	WiFi, H2D, DConnect, Google, Alexa
Supply (each)	240V, 50Hz — pre-fitted plug
WRAS	Yes
Warranty (each)	3 years (DAB)

Storage tanks — 2 × 1000L

Combined capacity	2000 litres
Number of tanks	2 × 1000L slimline
Per-tank dimensions (W × L × H)	600mm × 1250mm × 1703mm
Side-by-side footprint	1200mm × 1250mm × 1703mm
End-to-end footprint	600mm × 2500mm × 1703mm
Material	WRAS-approved MDPE polyethylene
Construction	Vertical baffled, 100% rust-proof, UK manufactured
Included	Tank-to-tank connection kit, By-law 30 kits, ¾” ball float valves, stainless steel twin-pump frame, PVC pipework
Warranty (each tank)	10 years

!The Esybox pumps cannot connect directly to the mains. The tanks are supplied from the mains water inlet and the pumps draw from the interconnected tanks. In-service combined weight is approximately 2100kg — floor loading is critical and must be confirmed before install. Consider distributing tanks across separate floor points if loading is a concern.

How it compares

The Slim 2000 Twin is the top of the Slim range — here’s how it compares to the closest alternatives.

Feature	WB-Advant Slim 1000 Twin	WB-Advant Slim 2000 Esybox	WB-Advant Slim 2000 Esybox Twin this product	WB-Advant 2000 Esybox Twin
Storage capacity	1000L	2000L	2000L	2000L
Access width	600mm	600mm per tank	600mm per tank	1350mm
Fits through standard doorway	Yes	Yes — each tank	Yes — each tank	No
Pumps	2 × DAB Esybox	1 × DAB Esybox	2 × DAB Esybox	2 × DAB Esybox
Combined flow	140 l/min @ 3 bar	80 l/min @ 3 bar	140 l/min @ 3 bar	140 l/min @ 3 bar
Peak duration @ full flow	~7 min	~25 min @ 80 l/min	~14 min @ 140 l/min	~14 min @ 140 l/min
Pump redundancy	Duty/Assist	Single — H2D-ready	Duty/Assist	Duty/Assist
Tank warranty	10 years	10 years each	10 years each	10 years

Which should I choose?
WB-Advant Slim 1000 Twin — single 1000L slim tank with twin pumps. Peak flow and redundancy on the smaller buffer. Choose where 1000L reserve is enough.
WB-Advant Slim 2000 Esybox — twin 1000L slim tanks with a single pump. Bigger buffer at lower cost, H2D-ready for later pump upgrade. Choose where storage matters more than redundancy on day one.
WB-Advant Slim 2000 Esybox Twin — the flagship. Twin tanks, twin pumps, maximum storage AND maximum flow AND full redundancy, still fitting through a standard doorway. Choose this for very large properties, small commercial, and any install where you need everything.
WB-Advant 2000 Esybox Twin — standard-footprint 2000L twin at 1350mm wide. Only viable where access allows; not suitable for restricted plant rooms.

Frequently asked questions

Will each tank fit through a standard doorway?

Yes — each tank is 600mm wide, so each passes through a standard 762mm (30″) internal doorway with 162mm to spare. The tanks are transported separately and connected on-site with the supplied tank-to-tank link kit. Both pumps arrive separately for installation on the stainless steel mounting frame alongside the tanks. Always measure the narrowest point on the install route first, including any tight corners and ceiling clearance for the 1703mm tank height.

How much floor space do the two tanks need?

You have flexibility in how they’re arranged: side-by-side takes about 1200mm × 1250mm plus pump frame; end-to-end takes about 600mm × 2500mm plus pump frame. Both configurations are 1703mm tall. If neither fits, the tanks can be installed in separate rooms linked by pipework — giving true installation flexibility no monolithic 2000L tank can offer.

Do both pumps run together, or one at a time?

Both. Under normal demand, load is balanced across the pair to distribute wear. Under peak demand, both engage together to deliver the full 140 l/min. If one is unavailable, the other continues alone with no interruption — giving you true continuous supply during service or in the event of a pump fault.

How is this different from the WB-Advant Slim 1000 Twin?

Identical pumps and identical peak flow (140 l/min combined) — the difference is the storage buffer. The 1000L Slim Twin gives around 7 minutes of continuous peak flow before mains refill; this 2000L Slim Twin gives around 14 minutes. Choose this where extended peak demand or slow-filling mains means the 1000L buffer isn’t enough.

How are the two tanks connected?

The tanks are linked by a supplied tank-to-tank connection kit that maintains a common water level between them — both pumps draw from either tank, and both tanks fill from the mains via their float valves. The two tanks effectively behave as one large 2000L reservoir.

Can a pump be replaced independently if it fails?

Yes — both Esybox units are external pumps mounted on the stainless steel frame alongside the tanks. Either can be disconnected and replaced independently, and the remaining pump continues to run during the changeover.

What’s the total in-service weight?

Combined in-service (filled) weight is approximately 2100kg. Floor loading is a critical consideration — the slab or floor structure must support this on the full contact footprint. If floor loading is a concern, the two tanks can be installed in separate rooms to distribute the load across different foundation points.

Can the pumps connect directly to the mains?

No — the Esybox pumps cannot connect directly to the mains. The mains supply fills the tanks via the pre-fitted ball float valves, and the pumps draw from the tanks. This ensures full compliance with Water Regulations and provides a storage buffer for peak demand periods.

How does the WiFi and voice control work?

Each DAB Esybox connects to the DConnect app via built-in WiFi for remote pressure monitoring, adjustment, and fault alerts. Both also integrate with Google Home and Amazon Alexa — say “Hey Google, power shower” to boost pressure, or “Hey Google, sleep mode” to quieten at night.

What warranties are included?

10 years on each storage tank, and 3 years DAB manufacturer warranty on each Esybox pump — when purchased from Anglian Pumping Services.

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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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Frequently Asked Questions

Quick answers to common questions about the WaterBoost WB – Advant 2000 slim Esybox Twin 2104410DSL. 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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