The WaterBoost Grand 5000 is the flagship of the Grand range — a 5,000L Enduramaxx slimline tank paired with a DAB Esybox Twin for full duty/standby pump redundancy and 140 L/min boosted output. 67% more stored volume than the Grand 3000 in a footprint just 290mm wider — the top-of-range option for large commercial properties, hospitality peak-day loading, or domestic properties needing a full week’s buffer against mains interruption.
A single-tank design — no linking pipework, fewer joints, faster install than a comparable twin-linked setup. The Esybox Twin pump frame runs two DAB e.sybox units in wireless duty/standby, alternating priority every 23 hours, with full pump redundancy if one unit fails.
5,000L storage Flagship capacity Duty/standby pumps Single-tank design DAB Esybox Twin 10-year tank warranty
Flagship of the Grand range. Delivered assembled — requires 1,300mm+ access opening and a level base rated for ~5,050 kg when full. For narrower installations, see the Grand 3000 (960mm wide, 3,000L) or Grand 2000 (850mm wide, 2,000L).
