WaterBoost ATX-300 Whole House Mains Pressure Booster

The WaterBoost ATX-300 is the second largest model in the ATX integrated accumulator booster range, connecting directly to the incoming cold water mains. It combines a 300-litre sealed accumulator vessel with a variable speed pump in a single compact unit — automatically boosting both pressure and flow throughout the property the moment a tap or shower is opened. No break tank, no overflow arrangement, just two water connections required.

The system delivers a peak burst flow of up to 45 l/min and up to 27 l/min at 3.2 bar for up to 11 minutes — before settling to a continuous boosted flow of 12 l/min at 3 bar until the vessel recharges. The 300-litre vessel provides 180 litres of useable working capacity. Variable speed inverter technology means the pump only generates the pressure your mains can't already deliver, keeping running costs to a genuine minimum. Operation is measured at a quiet 40 dB(A). WiFi via the DConnect app enables remote monitoring and control. A mains bypass fits in seconds using 2 clips if the unit ever requires attention.

WRAS approved product. Fully sealed system — zero air contact with stored water, no hygiene management required. Completely maintenance free. Suited to 2-4 bed homes upwards, combi-boiler properties and unvented cylinder systems. 5-year tank warranty, 3-year pump warranty. Step up to the ATX-450; step down to the ATX-250 for smaller properties.