Low water pressure

If the water supply pressure is insufficient to meet the required pressure and flow values for plumbing fixtures, a water pressure booster system must be installed. There are three main options:

• An elevated water tank
• A hydro-pneumatic pressure booster
• A water pressure booster pump, which is the topic of this article

Keep in mind that the need for a water booster pump is partly determined by building characteristics; since the minimum pressure and flow rate values are specified at fixture outlets, the likelihood of needing a booster pump increases for taller buildings.
The Plumbing Code requires that all booster pumps be equipped with a low-pressure cutoff switch, which prevents the creation of a vacuum when the pressure on the suction side reaches values of 10 psi or less. When negative pressure isn’t accounted for, a phenomenon called cavitation occurs, where small bubbles rapidly form and collapse in the flowing water. Cavitation can cause localized shockwaves, damaging the booster pump impeller and inducing mechanical vibrations, which affect the motor driving the pump as wellowner. An individual water consumer is not allowed to supply pressurized water for neighboring buildings.
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