Troubleshooting flowchart

START: What is wrong?

No water: tank/source -> vent -> valve -> strainer -> inlet air leak -> pump power/prime -> distribution. Low/pulsing flow: aerator -> filter pressure drop -> battery voltage -> kink -> accumulator/pre-charge -> pump setting. Pump cycles with taps closed: visible leak -> isolate branches -> check valve/backflow -> toilet/heater relief -> hidden leak. Bad taste/odor: one tap vs all -> hot vs cold -> fresh water vs drain -> source -> filter status -> stagnation/sanitization. Slow/smelly drain: strainer -> trap -> slope/sag -> vent -> grey level -> tank buildup.

Measure one point at a time and change one variable. Never bypass a safety device or drink unknown water just because flow returned.