The Aquavar e-ABII pump controller: Think of it as “cruise control” for your pump:
Residential, Commercial Variable Speed Constant Pressure Pump Controllers
The Aquavar e-ABII pump controller provides an economical answer for municipal and private water systems with low water pressure. Both domestic and light commercial above ground boosters can benefit.
As water use increases, the controller changes pump speed to maintain pressure. Large supply tanks are eliminated and up to 50% of the energy required by a full speed pump is saved.