I had barely any information regarding my central vac system, and he was able to get me the exact right part I needed to repair my system.
Low-Voltage On/Off 30' Hose
This hose comes with a low-voltage on/off switch which allows you to shut the vacuum off at the handle. When the phone or doorbell rings, you don't have to walk all the way back to the valve and unplug the hose to turn off the machine. It also is a 1 3/8" ID hose for better air flow than smaller 1 1 1/4" hoses.