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I have a Nouva Simonelli Premier Maxi that I had to replace the volumetric pump in because it was plugged with hard water sediment. The new pump isn't giving me a consistent pressure, it seems to surge and my pressure guage needle bounces over a range of

Question asked by deanjo71 on Feb 22, 2017
Latest reply on Feb 22, 2017 by fixbear

The new pump isn't giving me a consistent pressure, it seems to surge and my pressure guage needle bounces over a range of 5 bars. I have tried adjusting the pressure screw, but no setting gets rid of this "surge" completely. Is this just a product of using a Fluid-O-Tech pump, or is there another problem? I've had no problems with pumps from other manufacturers in other brands of machines, and this has me stumped.

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