WaterBoost – Coffin
WB-Coffin 320 Mini3 Variable Speed
- Established 1975
- Trusted by thousands of customers
WaterBoost WB-Coffin 320 Mini3 – Variable Speed Water Boosting System
The WaterBoost WB-Coffin 320 Mini3 is a compact, variable-speed water boosting system designed to overcome low water pressure or flow in domestic and light commercial applications. It offers a cost-effective solution where installation space is limited, while still delivering reliable performance and high build quality.
The system combines a 320-litre coffin-style WRAS-approved Polytank with the proven DAB Esybox Mini3 booster pump, providing efficient and consistent pressure boosting of up to 45 litres per minute at 3 bar. This makes it ideal for properties requiring improved performance across showers, taps, and appliances without the complexity of larger systems.
With a compact footprint of 1650 mm (L) × 610 mm (W) × 500 mm (H), the WB-Coffin 320 Mini3 is well suited to installations where height restrictions or access limitations are a concern, such as garages, cupboards, or plant rooms.
The tank is supplied pre-fitted with a By-law 30 kit and ½″ ball valve, and all interconnecting pipework is included, ensuring a swift, straightforward installation. Energy-efficient operation is achieved through the Mini3’s variable-speed control, delivering smooth pressure while minimising running costs.
More about this product
WB-Coffin 320 Mini3 – Variable Speed System Contents
The WB-Coffin 320 Mini3 is supplied as a complete, ready-to-install water boosting system, combining a WRAS-approved coffin tank with a high-efficiency variable-speed booster pump.
System Includes
-
320-litre WRAS-approved Polytank (coffin configuration)
-
DAB Esybox Mini3 variable-speed booster pump
-
Integrated inverter control
-
Supplied with 3-year manufacturer’s warranty
-
-
½″ ball float valve and float assembly
-
Tank-to-booster interconnecting pipework (pre-configured for ease of installation)
All components are selected to ensure reliable performance, compliance with UK water regulations, and straightforward installation.
Tank Specification
-
WRAS-approved Polytank Byelaw 30 kit
-
Installation and fitting instructions included
-
½″ BS1212 Part 2 ball valve with 4½″ float
-
Ball valve back plate
-
22 mm compression tank connector
-
15 mm × ½″ angled service valve
The coffin-style tank design provides a compact, low-profile solution, ideal for installations with restricted headroom.
Booster Pump Overview – DAB Esybox Mini3
The DAB Esybox Mini3 is a proven, best-selling water booster pump, widely used in domestic and small commercial installations. Fully integrated and digitally controlled, it automatically adjusts pump speed to maintain consistent water pressure, even under fluctuating demand.
Compact, energy-efficient, and exceptionally quiet in operation, the Mini3 delivers smooth pressure boosting while minimising energy consumption and running costs. Its all-in-one design makes it a reliable and installer-friendly choice for tank-fed water boosting systems.
-
Esybox Mini3 PDFDownload
-
manual PDFDownload
Standard delivery:
Standard delivery is free for all orders except for some low cost/low margin items where standard delivery is £6.75. Some difficult to transport goods also have a varying carriage charge applied.
Please contact us for the estimated standard delivery times of the products that we have in stock, by dropping us a message on our Whatsapp or Live chat.
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 £15.00 + 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.
You may also need
Slimline 300 litre c/w DAB Esybox Mini3 The 300 litre WaterBoost Systems ‘Slimline’ EXT is designed to be a cost effective solution to low water…
WaterBoost Slimline 300 litre Fixed Speed The 300 litre WaterBoost Systems ‘Slimline’ are designed to be a cost effective solution to low water pressure or…
Slimline 300 litre c/w DAB Esybox The 300 litre WaterBoost ‘Slimline’ EXT are designed to be a cost effective solution to low water pressure or…
Related products
The DAB Esybox is a top-selling water booster pump—and for good reason. The DAB Esybox is an advanced, fully integrated water pressure booster system designed…
DAB Esybox Mini 3 – Cold Water Electronic Booster Pump The DAB Esybox Mini is one of our top-selling cold water electronic booster pumps, renowned…