WaterBoost - Coffin
The WaterBoost Coffin Range is a cost-effective, break-tank booster set that solves low water pressure and flow — engineered for installations where head height is tight or access is awkward. The low-profile “coffin” tank slips through a standard loft hatch and into shallow roof spaces, cupboards and crawl spaces where a tall cylinder simply won’t fit.
It pairs a Polytank WRAS-approved storage tank with the renowned DAB Esyline pump range to deliver up to 80 l/min at 3 bar — a high-flow, energy-efficient solution that keeps installation cost down without compromising quality.
Why choose the Coffin Range?
What’s in the set
| Tank | Polytank WRAS-approved cold water storage — low-profile coffin profile |
| Compliance | Prefitted Byelaw 30 kit + ½" ball valve |
| Pump | DAB Esyline booster — up to 80 l/min at 3 bar |
| Pipework | All interconnecting pipes included |
If space is tight or budget matters, the WaterBoost Coffin Range delivers strong, reliable pressure and flow without the installation headache. Choose your set below.
Not sure which WaterBoost you need?
Five questions and the sizer picks the tank and pump for your house.
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10 products
The WaterBoost WB-Coffin 200 POP is a compact, variable-speed water boosting system designed for smaller domestic applications where space is restricted and a modest boost…
The WaterBoost WB-Coffin 200 Mini3 is a compact, variable-speed water boosting system engineered to overcome low water pressure or inadequate flow in domestic and light…
The WaterBoost WB-Coffin 320 Mini3 is a compact, variable-speed water boosting system engineered to overcome low water pressure or inadequate flow in domestic and light…
The WaterBoost WB-Coffin 340 Mini3 is a complete variable-speed water boosting system engineered to overcome low water pressure or restricted flow in domestic and light…
The WaterBoost WB-Coffin 450 Mini3 is a compact, variable-speed water boosting system engineered to overcome low water pressure or restricted flow in domestic and light…
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…
The WaterBoost WB-Coffin 320 Esybox is a compact, variable-speed water boosting system engineered to overcome low water pressure or restricted flow in domestic and light…
The WaterBoost WB-Coffin 340 Esybox is a complete variable-speed water boosting system engineered to overcome low water pressure or restricted flow in larger domestic homes…
The WaterBoost WB-Coffin 450 Esybox is a compact, variable-speed water boosting system engineered to overcome low water pressure or restricted flow in domestic and light…
The WaterBoost WB-Coffin 500 Esybox is a complete variable-speed water boosting system engineered to overcome low water pressure or restricted flow in larger domestic homes…
Frequently Asked Questions
Quick answers to common questions about the WaterBoost – Coffin. 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.