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What makes a rainwater pump keep starting and stopping?
Frequent starts can come from a small, brief draw, but they can also point to an issue with the pressure tank, pump controls, or plumbing. What’s the most useful way to tell those apart?
Does the pattern change when every outlet is closed, compared with a steady draw from a tap? And how should the pressure-tank charge and pump controls be checked safely, especially if those checks involve isolating power or water pressure? I’d like to know what observations are useful before deciding whether the pump or system needs an inspection.
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Start by watching the pressure gauge and pump through two conditions: all outlets closed, then a steady tap draw. Cycling with everything closed points toward water escaping somewhere or a control/tank issue; cycling only during tiny draws can fit short cycling. What happens during a steady draw depends on the draw and system. Note the pressure at cut-in and cut-out and check for visible leaks, but treat these as clues, not a diagnosis. Tank-charge checks require the system depressurized; control work requires power isolated. If unsure how to isolate both safely, have a qualified person inspect it.
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