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.
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.