why it looks so different from a standard electrical receptacle.
How Can You Tell If Your House Still Has the Vacuum System?
If you want to investigate, look around the house for other identical wall inlets.
Central vacuum systems usually have multiple inlet locations so a long hose can reach different parts of the home.
You can also check the garage, basement, utility room, or another mechanical area for a large vacuum power unit.
It may look somewhat like a large canister mounted to the wall.
