A Flair 58 pressure gauge can stay near zero for two very different reasons: the puck is not creating meaningful resistance, or pressure exists but the gauge is not receiving/displaying it.
What pressure should a normal Flair shot create?
Flair’s current brewing guidance uses roughly 6–9 bar as the normal espresso zone and about 25–35 seconds as a common extraction window. Those are diagnostic references, not a command to force the lever to 9 bar.
If the shot is fast and the gauge is low
Grind finer. Flair’s own pressure/brew-time guidance says low pressure plus short brew time means the puck needs more resistance. Keep dose and target yield stable while adjusting.
If the lever has resistance but the gauge stays at zero
Stop changing grind endlessly. Confirm the gauge assembly is installed correctly, the brew chamber is filled/primed correctly and the gauge/stem path is not loose or leaking. Use Flair’s gauge troubleshooting for the exact 58 revision.
Could air or incomplete filling confuse the reading?
Yes. The Flair workflow requires a correctly filled brew chamber. An incomplete fill can change the hydraulic behavior and should be corrected before condemning the gauge.
When should the gauge be replaced?
Only after the puck is clearly producing resistance and the installation/path has been checked. A zero reading during a gusher is not proof of gauge failure.
| Observation | Next move |
|---|---|
| Gauge low + lever easy + fast flow | Grind finer |
| Gauge zero + strong lever resistance | Check gauge/stem/install path |
| Leak around gauge connection | Stop and correct seal/connection |
| Incomplete chamber fill | Correct fill/prime first |