new return pump

[ocean diver]

I have a waveline DC 6000 and it is super quiet in my sump....it was that way right from the box

[sphelps]

I've never heard of pumps breaking in and becoming quieter, what's the logic behind that? As parts wear the pump should become nosier if anything. I think as time goes on people tend to tune out white noise. In other words it doesn't get quieter, you just get use to it. If the pump is noisy now then that won't change unless you actually change something. Vibration is a pretty typical source, it can be reduced with pads as other have mentioned and/or with flexible plumbing instead of rigid.

[Scythanith]

My Abyzz pumps had a "run in" period. But they were silent right from the start.

[Reef Pilot]

Originally Posted by sphelps

I've never heard of pumps breaking in and becoming quieter, what's the logic behind that?

Mine do. I have bought several in tank pumps for my upstairs tank which is in the kitchen. And my wife has very good ears... They typically make a little more noise for the first week or two and then quiet down. And when they wear, they make a lot of noise...