Pressure-Boosting Stations: When They Are Needed and How to Size Them
In neighborhoods located at higher elevations or at the end of the network, the pressure drops below the comfort threshold. The solution is a properly sized pressure-boosting station.
The pressure in the public drinking water system is not the same everywhere. At the end of a long branch line, on upper floors, or in a neighborhood located higher than the water supply tank, the pressure can drop to the point where the shower upstairs becomes just a trickle.
Signs That a Boosting Station Is Needed
- Noticeably lower pressure during peak usage hours, in the morning and evening
- Significant difference in pressure between the ground floor and upper floors
- Insufficient flow when multiple fixtures are in use simultaneously
- New neighborhoods connected to the end of an existing network, which was designed for fewer consumers
Before installing any equipment, measure the network pressure over the course of several days. A single measurement is not meaningful: what matters is the minimum value during peak consumption, not the average.
Sizing: Flow Rate, Pumping Head, Simultaneity
A pump station is selected based on three parameters. The design flow rate is determined by the number of consumers and the simultaneity factor—not everyone turns on the faucet at the same time, and oversizing increases both purchase and operating costs. The head covers the elevation difference plus pressure losses along the route. The minimum pressure required at the most unfavorable consumption point completes the calculation.
Modern systems use variable-speed pumps, which adjust consumption to actual demand. The difference compared to a traditional on-off system is reflected in the energy bill and in the equipment’s lifespan, which can no longer withstand dozens of starts per hour.
The Underground Chamber: The Part That’s Often Overlooked
The equipment is only half the job. The reinforced concrete chamber housing the pump unit must be watertight, ventilated, accessible for maintenance, and protected against freezing. A chamber with leaks dramatically shortens the lifespan of the electrical panel and the automation system.
We always provide drainage at the bottom, a compliant access ladder, lighting, and actual working space around the pumps—not just the minimum space required for the equipment to physically fit.
Automation and Protections
A properly equipped station shuts off the pumps when there is no water on the suction side, signals malfunctions, and automatically alternates between pumps to ensure even wear. A properly sized expansion tank reduces the number of starts and stabilizes the pressure.
The result of a well-designed station is that no one even notices it: the pressure is constant, and maintenance is limited to periodic inspections.