WaterBoost WB – Advant 400 slim Esybox 2604B110TP

The WaterBoost WB-Advant Slim 400 Esybox TP is the narrowest tank in the entire WaterBoost range with the higher-flow DAB Esybox pump mounted directly on top of the tank — serious performance in installations with severely restricted access, on nothing more than the tank’s own footprint. A 400-litre WRAS-approved UK-manufactured Advant slimline tank (400mm W × 1050mm L × 1253mm H) pairs with the DAB Esybox variable speed pump, delivering 80 l/min at 3 bar and up to 6.5 bar maximum — with WiFi, DConnect app, H2D technology, Google Home and Alexa voice control.

Suitable for heat pump systems. Gives an unvented hot water cylinder the pressure and flow it needs where the mains supply falls short.

At just 400mm wide, the vertical slimline tank passes through a standard doorway with a generous 362mm to spare — opening up loft hatches, tight cellars and utility spaces that no other tank can reach. With the Esybox top-mounted on the tank, the system takes up no floor space beside the tank at all, while the pump stays at working height for servicing and runs at an exceptionally quiet 43 dB(A). The tank connects directly to the mains via the pre-fitted ¾” ball float valve, with 1.5” outlet. Pump platform and all interconnecting pipework supplied — no site assembly required.

The UK-manufactured tank carries an outstanding 10-year warranty and the DAB Esybox a 3-year warranty. Delivery is typically 1–2 working days.