Sorry for offtop .
We have a 2010 Electrolux PU3650
https://cozzy.org/best-central-vacuum-system-reviews/and we've had it for almost a year. We thought the vacuum was a nice feature and ordered ours with it. When we got it, we tried it and it just didn't live up to our expectations. I finally got around to checking it out. My dad also has a Electrolux with the vacuum and I tried his and his worked a lot better. So, I knew something was wrong with mine. Checked the hose, and it's fine. Both areas to connect the hose worked the same. I read that someone opened up their bottom step and accessed the hose there and fixed their problem. I found one screw on the step and took it out and it allowed me to get to the back where the hose connects to the plastic outside part. It was not aligned correctly and was sucking air behind the front plastic piece. I unscrewed it and aligned it correctly and re-screwed it and now it works WAY better and is now worth paying extra for it. So, if yours is not sucking as hard as you think it should, something may be wrong with it.