Hello coffee lovers.
This is my first comment on this forum. Humbly I would like to point some issues about this mode. Firstly I haven’t tried that and I am not willing to. Because as a marine engineer I can say that the pump will not be happy to work with the new piping system as aspect of fluid dynamics. The more fittings, valves, connectors, elbows etc. etc. cause more friction, energy loss by heat. They create more critical issues on the suction sides of the pumps, as like cavitation.
In our case, with new suction piping system, suction head of the pump decreases and pump may suffer to suck water properly compering with the previous original pipings because the OPV not all time keeps open, not feeds water continuously. In conculation we may obtain non-uniform flow and in long term shorter life of the pump, those effect the cup quality obviously. In my opinion the best option of this mod is re-routing the opv exhaust directly to the tank, instead of the pump suction.
I just wanted to share my thoughts, not advising any thing to anyone. Best regards to all.