NelisB , I often heard a resonance when the pump was working. I thought the resonance was from the pump. But now the machine is pumpless, I still get the resonance when I pull down the lever and water flows through the system. It seems to come from the manifold. Does anyone know how to get rid of it?
Yup, it does….since Paolo has been experimenting with a quietr pump of a completely different type I suggested, he can hear this resonance from the water distributor. I think it’s “reeding” (like a clarinet) from the one way valve.
The one way valves have a spring which holds them closed and when the pump starts, it pushes them open…I think these might be the cause of noise. It might be that a different tension spring will stop it, dunno, under investigation and may not be stoppable.
