Ellejaycafe wrote:I always suspected the flow rate is much lower when pulling a shot.... the resistance of the ground coffee doesn't allow the water to simply explode out of the group. I could be completely wrong.
okmed wrote:Without the check valve function are you not concerned about water backing up into the boiler until the piston travels enough to block off the inlet opening on the cylinder wall ?
NelisB wrote:That would be as you let the lever up, building up pressure, but before blocking the inlet opening?
bakafish wrote:Why mod? It is adjustable.
NelisB wrote:Because the spring is pushing back the flow of the water coming from the boiler.