WB-Compact 4.5 ACF1 – Accumulator Booster Pump (Floor Mounted)

The WaterBoost WB-Compact 4.5 ACF1 is a compact floor-mounted variable speed pump designed to charge external accumulator vessels to up to 4.5 bar. If your static mains pressure is below 2 bar and you are installing an accumulator, the ACF1 charges the vessel to the pressure needed for effective operation — working seamlessly alongside GWS, WaterBoost, Lowara, Grundfos, and Stuart Turner accumulators in both vertical and horizontal configurations.

Advanced variable speed inverter control automatically adjusts output to match demand, delivering energy savings of up to 50% compared with fixed-speed alternatives. Operates at a quiet 45 dB(A). Pressure is easily adjusted via the integrated LCD display. WiFi via the DConnect app enables remote monitoring and control, with voice control integration available. Wireless update capability allows future performance enhancements. Compact footprint at 439 × 263 × 236mm, weighing 15kg.

WRAS approved for potable water. 3-year warranty. For a wall-mounted alternative, see the WB-Compact 4.5 ACW1.