Low pressure symptoms
Low pressure may appear as poor showers, slow filling outlets, pressure loss on upper floors, intermittent pressure drops, poor flow at peak times or pressure that falls when several outlets are used.
Common causes
Low booster pump pressure may be caused by undersized equipment, a failed pump in a twin set, blocked strainers, low inlet pressure, a failed pressure vessel, incorrect pressure settings, leaking valves or a pressure sensor problem.
Checks that help
Check whether pressure is low everywhere or only in one area, whether the pump runs, whether pressure changes during peak demand, and whether the control panel shows a fault or pump status.
When replacement may be needed
If the system is old, repeatedly failing, undersized or cannot maintain pressure under normal demand, a replacement booster set may be a better long-term solution than repeated repair.