I came across this during a verification on a dental clinic inside a hospital. They are trying to use the hospital medical vacuum system to run the dental vacuum in two dental procedure rooms.

1. Is there a code reference disallowing use of med vac for dental?

2. What flow rate(s) are to be achieved at the dental chair? 

Here are a few obstacles from 2018 that might prohibit using a medical-surgical system for dental vacuum inlets

15.3.3.5.1.2   Dental vacuum inlets shall not be interchangeable with any other vacuum inlets, including dental-surgical vacuum.

5.1.14.1.3* Liquid or debris shall not be introduced into the medical–surgical vacuum or WAGD systems for disposal.