Ive got a single speed Stenner pump, Its the 45 series and when it runs, as the rollers spin around, you can hear them forcing the pump tube to push against the housing and cause a squeak that is really loud. we can hear it inside the house through a stucco wall. Ive changed the pump tube and cleaned out the housing and still does it. I made a video on you tube that shows the problem.
Stenner peristaltic pump squeak - YouTube
I use this to pump diluted chlorine into return pipe for pool
Any help will be appreciated on how to stop it. Ive sent email to technical support for Stenner but have not heard back yet.