A couple years ago, my forward vacu flush was running a lot. I replaced the bellows, pressure switch, and duck bills. Seems there were only 2 duck bills total, I added the adaptor to ensure there were the required 4, 2 on each side. Out of nowhere, the thing started going off every 3 or 4 minutes. MAy I add, we use the forward head for “liquids” not solids. The stern one works flawlessly and always has.

Where would you start<?? check the bellows? replace duck bills again? That pressure switch was pretty expensive if I may add. New O ring etc.

Again, asking for thoughts.

Thanks!