WaterBoost WB-Fixed 300 Litre Slimline 2302510

Which should I choose?

WB-Fixed 300 Slimline — the strongest all-round fixed-speed option at the lowest price (£691.65 + VAT). More storage than either Powertank, higher flow (50 vs 40 l/min), internal pump, named 5yr tank and 3yr pump warranties. The right choice for potable water boosting in 3–5 bedroom homes.

Powertank SLIMLINE 200 Fixed — choose if Fluid Category 4 compliance is required and storage and flow requirements are modest. 200L / 40 l/min. £744.60 + VAT.

Powertank SLIMLINE 350 Fixed — choose for Fluid Category 4 with more storage (350L). Still 40 l/min. At £775.00 + VAT it is more expensive than the WB-Fixed 300 with lower flow and no named warranties. Choose only if Cat 4 is required.

How much does it cost and how is it delivered?

£691.65 + VAT (£829.98 inc VAT). Please contact us via WhatsApp or phone for delivery timescales on this product.

What is the DAB Dtron2 and how does it differ from the Esybox Diver?

Both sit submerged inside the tank, but the DAB Dtron2 is a fixed-speed pump — it runs at a constant speed and delivers a consistent 50 l/min @ 3 bar. It’s simpler, lower cost, and carries a 3-year warranty. The Esybox Diver (used in the WB-INT Slimline 300 Variable Speed) is a variable speed pump delivering up to 100 l/min and 5 bar, with built-in WiFi, DConnect app, Google Home, and Alexa. Choose the Dtron2 for reliable fixed-speed performance at a lower cost; the Esybox Diver for maximum performance and smart home integration.

How does the mains connection work?

The mains supply connects directly to the tank via the pre-fitted ¾” ball float valve. The tank fills automatically. The Dtron2 draws from the tank and boosts pressure throughout the property. A minimum of 0.5 bar incoming pressure is required.

Should I choose fixed speed or variable speed?

Fixed speed (this product) is simpler, lower cost, and delivers consistent 50 l/min @ 3 bar. It’s an excellent choice where flow demand is moderate and steady. Variable speed (the WB-INT Slimline 300 at £1,027.75 + VAT) adjusts continuously to match demand — more energy-efficient at low demand, quieter at low draw, and capable of significantly higher flow (100 l/min) and pressure (5 bar). Variable speed also includes WiFi and voice control. If budget allows and higher performance is beneficial, the variable speed system is worth considering.

Will it fit through my doorway?

Yes — at 600mm diameter, the tank passes through a standard UK doorway (760mm minimum clear opening) without disassembly. If your access point is particularly narrow, please contact us to confirm suitability.

What warranties are included?

5 years on the WRAS slimline tank and 3 years DAB warranty on the Dtron2 pump, when purchased from Anglian Pumping Services.