I'm selling my house and the buyer wanted the central vac to be operational. This is an old unit - more than 25 years old - and I wasn't terribly optimistic that anyone could make this old vac work well again. I called Michael at Superior Vacuums and he sent John to take a look at it. John snaked it out, replaced some poorly designed parts and not only got the thing operational again - it works GREAT!!! Fantastic, helpful, on time and reasonable rates - these guys are amazing. I am so pleased with their service!!