VSD Pump

Choose a VSD booster if you have more than two bathrooms, a two-storey house, a guesthouse or lodge, or you simply want the pressure to stay the same when someone flushes while you shower. They are also the right choice for inverter and solar back-up, because they never draw a start-up surge.Choose a standard booster with a pressure tank and switch if budget is the priority, or for a cottage, garden or single bathroom. See our booster pumps.Already have a good pump? An AR200 VSD controller fits between the supply and the pump and gives you constant pressure, dry-run protection and soft start without replacing the pump.Sizing: 0.37–0.75kW for up to three bathrooms, 1.1kW for four to five, 1.5–2.2kW for lodges, flats and irrigation. A VSD booster only needs a small 8–24L tank to prevent cycling. For large three-phase pumps, see our separate variable speed drives.

Does a VSD pump save electricity?Yes. Because it runs only as fast as the demand needs, it typically uses noticeably less power than a fixed-speed pump doing the same job, and it avoids the heavy start-up current entirely.Can I run a VSD booster from an inverter during load-shedding?Yes, and it is one of the main reasons people buy them. A 0.75kW VSD booster runs comfortably on most 3kVA inverters because it ramps up gently instead of surging.Do I still need a pressure tank?Only a small one. Most VSD boosters work with an 8L–24L tank to absorb drips and small leaks, instead of the 50L–100L tank a conventional set needs.What protection is built in?Dry-run protection and soft start are built into the controller on these ranges, so you don’t need a separate control box. The full protection list for each model is on its product page.