Ran a little test today on the old gauge. Didn’t think about doing so with the new one. Next time I dismantle the machine I guess…
So I have this fancy high end bike pump and I know it’s pretty precise. Having compared its display to a professional digital gauge.
And it shows that the early theory (gauge is faulty at low pressure) is probably the correct one. 😉
At 2 bar on the pump, gauge shows barely above 1:
![](https://i.imgur.com/YvquPbW.jpg)
At 3 on the pump, the gauge is at 2:
![](https://i.imgur.com/23b7Rr4.jpg)
At 4 on the pump, the gauge finally wakes up and is closer to the truth:
![](https://i.imgur.com/ot3yC0A.jpg)
And at 8.5 bar, the gauge is almost spot on:
![](https://i.imgur.com/BvuWMUD.jpg)
I wonder if the gauge was problematic since day one - I know the previous owner got some repairs done under warranty, but no details. Or if scale slowly affected it. I might let it soak in descaler as a useless experiment for another rainy Sunday!