Fwd: Pressure gauge behavior and leaking pump

[peter riess]

> Brewtus crew,
>
> After waiting 6mo for a new pressure gauge to arrive, and installing it a couple days ago, my problems are not yet resolved! My old gauge rested at two bars and then under pressure it was completely unreliable or so I thought…
>
> Sadly, the new gauge shows the pressure climbs to 14 bars during the shot and then after lowering the lever, it continues to climb until it’s pinned somewhere past 16 bars! I’ve attempted to make adjustments to the pressure via the pump, screw head, adjusting barrel or whatever you call it and also on the OPV, but I do not see where those adjustments are making any difference in the brew pressure. That said, over 30 seconds with a reasonable grind size I’m still able to pull a good shot at the correct volume.
>
> Any advice? Does tightening, by turning in and shortening the length of the brew pump adjustment barrel, increase the pressure or decrease the pressure? Do the OPV and pump need to be adjusted in unison? Why might the gauge continue to climb after the shot has been pulled and the lever is returned to the downward position?
>
> At one point, I thought the problem lay in the pump so I disassembled it, and having no luck finding a replacement pump, I reattached at all. I’m fairly certain it went back together correctly but now there is some leaking at the screw/barrel adjuster on the pump.
>
> I welcome anyone’s help here!
>
> Peter

[Eric Christoffersen]

If you had 14 bar to the puck it would blow out and make an awful shot.. If you’re getting good shots then pressure is ‘in the ballpark.’

I can’t understand why pressure would continue to rise. Perhaps there is a constriction that prevents pressure from registering quickly?

I guess this is a plumbed in rotary machine? I’ve never worked on one.

[Peter Riess]

Thanks for the reply. It is plumbed and yes, it’s a rotary pump.

RKAA, LLC

On Jul 27, 2025, at 12:19 AM, Eric Christoffersen <zak...@gmail.com> wrote:

If you had 14 bar to the puck it would blow out and make an awful shot.. If you’re getting good shots then pressure is ‘in the ballpark.’

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