Sorry to pick up on your thread but I'm in a similar situation needing to replace an old (>10yrs) Sanitop 2 that is on the way out and very noisy. Have been looking at Uniflo 4, various Saniflo models, and the Grundfos Sololift2 WC-1. Latter is 70dB(A) which is far greater noise than the 46dB(A) for the Saniflo. That has to be several times louder.
What to do?
What to do?