Name: WaterBoost WB-Coffin 500 Mini3 Variable Speed 2207210B
Brand: WaterBoost
SKU: WBKcoffin500mini
Price: 1062 GBP
Availability: InStock

WaterBoost WB-Coffin 500 Mini3 Variable Speed 2207210B

WaterBoost WB-Coffin 500 Mini3 Variable Speed 2207210B - Image 2

WaterBoost WB-Coffin 500 Mini3 Variable Speed 2207210B - Image 4

Established 1975
Trusted by thousands of customers

The WaterBoost WB-Coffin 500 Mini3 is a complete variable-speed water boosting system engineered to overcome low water pressure or restricted flow in domestic and light commercial properties. Designed for installations where headroom is limited, the low-profile coffin format fits where upright tanks cannot — under stairs, inside cupboards, in low-ceiling garages and plant rooms — without sacrificing storage capacity.

The system pairs a 500-litre WRAS-approved coffin-style tank with the DAB Esybox Mini3 variable-speed pump, delivering 50 l/min at 3 bar and a maximum delivery pressure of 5.5 bar. The pump’s intelligent inverter adjusts continuously to match demand — constant pressure to multiple outlets, lower energy use than fixed-speed alternatives.

Tank dimensions 2200mm (L) × 600mm (W) × 630mm (H). Supplied pre-fitted with By-law 30 kit, ½” ball float valve and 1″ brass connection. All interconnecting pipework included as standard.

50l/min

@ 3 bar

500L

Tank storage

45dB(A)

Ultra quiet

3yr

DAB warranty

WiFi · Google · Alexa
WRAS tank & pump
630mm height
Direct mains
Pipework included
5.5 bar max

Full Description

More about this product

Full Description

Product overview

The WaterBoost WB-Coffin 500 Mini3 is a complete, variable-speed water boosting system designed for installations where height is restricted. The coffin-style tank sits horizontally and stands just 630mm tall — fitting under stairs, inside cupboards, and in low-ceiling garages and plant rooms where an upright tank would not.

The mains supply connects directly to the tank via the pre-fitted ½” ball float valve. The DAB Esybox Mini3 variable-speed pump draws from the tank, delivering a consistent 50 l/min at 3 bar. The pump’s intelligent inverter adjusts continuously to match demand, maintaining stable pressure across multiple outlets simultaneously with low noise and reduced energy consumption.

Supplied complete with By-law 30 kit, ½” ball float valve, 1″ brass connection and all interconnecting pipework — ready to install with minimal on-site assembly. WiFi via the DConnect app, Google Home and Alexa compatible. 3-year DAB warranty. Delivery typically 2 to 3 working days.

500^L

Coffin tank

50^l/min

Flow @ 3 bar

630^mm

Tank height

45^dB

Pump noise at 1m

Tank & pump WRAS approved · Direct mains connection

What’s included

DAB Esybox Mini3 pump

Variable-speed pump delivering 50 l/min at 3 bar (70 l/min max), 55 metres max head, 5.5 bar max working pressure. Built-in inverter, expansion vessel, WiFi (DConnect app), 45 dB(A) at 1m. 3-year DAB warranty. Pre-fitted with plug.

500L coffin-style tank

WRAS-approved 500-litre horizontal coffin tank — 2200 × 600 × 630mm. UV-stabilised polyethylene, blue, UK manufactured. Connects directly to mains via pre-fitted ½” ball float valve, 1″ brass connection and By-law 30 kit. All tank-to-pump interconnecting 1″ braided hose included.

Key features

Low-profile coffin design

Only 630mm tall — fits under stairs, inside cupboards, and in any space where an upright tank would not. Footprint 2200 × 600.

Direct mains connection

Tank connects directly to the mains supply via the pre-fitted ½” ball float valve and 1″ brass connection. Minimum 0.5 bar inlet pressure required.

Variable speed — 50 l/min @ 3 bar

DAB Esybox Mini3 adjusts continuously to match demand — constant pressure to multiple outlets with lower energy use than fixed-speed alternatives.

WiFi and voice control

DConnect app for remote monitoring and control. Google Home and Amazon Alexa compatible — “Hey Google, power shower.”

45 dB(A) — ultra quiet

Water-cooled motor in sound-absorbing housing. Suitable for spaces close to living areas.

Tank and pump both WRAS approved

Both tank and pump carry WRAS approval — fully compliant for potable water use in the UK.

Complete and ready to install

By-law 30 kit, ½” ball float valve, 1″ brass connection and all interconnecting 1″ braided hose included. No additional fittings required.

3-year DAB warranty

3-year manufacturer warranty on the DAB Esybox Mini3 when purchased from Anglian Pumping Services. 5-year tank warranty.

UK-manufactured tank

100% rust-proof UV-stabilised polyethylene, blue, manufactured in the UK. 8″ pre-fitted access lid for inspection and maintenance.

Typical applications

Under-stairs and cupboard installations

Height restriction makes upright tanks impossible — the coffin format fits in spaces an equivalent round or square tank cannot.

Low-ceiling garages and plant rooms

Maximises usable space in converted garages and low-head plant rooms without sacrificing storage capacity.

Low mains pressure properties

Stores water from the direct mains connection and boosts to 5.5 bar max — consistent pressure to showers, taps, combi boilers and unvented cylinders.

Domestic and light commercial

Suited to homes, flats and small commercial premises with up to 2–3 bathrooms or equivalent simultaneous demand.

Water Regulations compliance

The storage tank with ball float valve provides the break between mains and pump, ensuring full Water Regulations compliance.

Low or intermittent mains flow

Tank stores water during off-peak periods, providing a reliable buffer for peak morning and evening demand.

Technical specifications

DAB Esybox Mini3 pump

Dimensions (W × H × D)	263 × 439 × 236 mm
Max flow rate	70 l/min
Flow @ 3 bar	50 l/min
Max head	55 metres
Max working pressure	5.5 bar
Noise	45 dB(A) at 1m
Connectivity	WiFi — DConnect app, Google, Alexa
WRAS	Yes
Warranty	3 years (DAB)

Coffin tank

Capacity	500 litres
Dimensions (L × W × H)	2200 × 600 × 630mm
Material	UV-stabilised polyethylene (blue)
Mains inlet	Direct mains — ½” BSP ball float valve, 1″ brass connection
WRAS	Yes — WRAS-approved material
Access lid	8″ pre-fitted
Included	By-law 30 kit, ½” ball float valve, 1″ braided hose
Warranty	5 years

How it compares

Two coffin-format water boosting systems with similar tank capacity — both connect directly to mains, both WRAS-approved tanks. The key differences are pump performance, smart features and warranty.

Feature	WB-Coffin 500 Mini3 this product	Powertank COFFIN 450 Fixed
Mains connection	Direct — ½” ball float valve	Direct — ½” ball float valve
Pump type	Variable speed (Mini3)	Fixed speed (Presflo Multi)
Flow rate @ 3 bar	50 l/min	40 l/min
Max delivery pressure	5.5 bar	4 bar
Integrated pressure vessel	Yes — in pump	Yes — 3L in controller
WiFi / app control	Yes — DConnect, Google, Alexa	No
Fluid Category	Cat 1–3 (potable)	Up to Cat 4
Pump warranty	3 years (DAB)	1 year

Which should I choose?
WB-Coffin 500 Mini3 — variable-speed energy efficiency, higher flow (50 l/min vs 40 l/min at 3 bar), WiFi and voice control, 3-year warranty. Best for domestic and light commercial properties where potable water performance and smart control matter.

Frequently asked questions

How much does it cost and how is it delivered?

Please contact us via WhatsApp or phone for current pricing. Delivery is typically 2 to 3 working days.

Why a coffin-shaped tank?

A coffin tank is a horizontal, low-profile rectangular tank. At just 630mm high, it fits under stairs, inside cupboards and in garages or plant rooms where the height available would prevent an upright tank from being installed. If height is not a constraint, an upright slimline system may offer a smaller floor footprint for the same capacity.

How does the mains connection work?

The mains supply connects directly to the tank via the pre-fitted ½” ball float valve and 1″ brass connection. The tank fills automatically from the mains and acts as a storage buffer. The DAB Esybox Mini3 pump then draws from the tank and boosts pressure to the property. A minimum of 0.5 bar incoming pressure is required to operate the standard fill valve.

What is the difference between this and the Powertank COFFIN 450 Fixed?

Both connect directly to mains and use a coffin-style tank of similar capacity. The WB-Coffin 500 Mini3 uses the DAB Esybox Mini3 variable-speed pump — delivering higher flow (50 l/min vs 40 l/min at 3 bar), WiFi and voice control, and a 3-year warranty. The Powertank COFFIN 450 Fixed uses a fixed speed (presflo multi).

Is 500 litres enough storage?

For most 3+ bathroom properties or light commercial applications, 500 litres provides a substantial buffer for peak demand. If less storage is needed, the 340-litre option is available with the same pump.

Should I choose Mini3 or Esybox?

The Mini3 is the right choice for most 2–3 bathroom domestic properties — compact, ultra-quiet (45 dB) and energy-efficient, delivering 50 l/min at 3 bar (70 l/min max). The Esybox delivers significantly higher performance — 80 l/min at 3 bar (120 l/min max) and 6 bar max pressure — for larger homes with 3+ bathrooms or light commercial premises with high simultaneous demand.

How does the WiFi work?

The DAB Esybox Mini3 connects to the DConnect app via built-in WiFi for remote pressure monitoring and control. It also works with Google Home and Amazon Alexa — “Hey Google, power shower” boosts pressure; “Hey Google, sleep mode” reduces it at night.

What warranty is included?

3 years DAB manufacturer warranty on the DAB Esybox Mini3 pump and 5 years on the tank when purchased from Anglian Pumping Services.

Downloads

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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