2: Prerequisites
12
Service Line Requirements
All utility service lines should be ¼ inch O.D., brass, copper, or stainless steel, and
equipped with an easily accessible shut-off valve. If the service line pressure
exceeds 40 PSI, it must be equipped with a pressure regulator to reduce the line
pressure.
The use of flammable gases or solvents should be avoided in the cabinet. Open
flame in the cabinet will disrupt the laminar airflow in the cabinet and may damage
the HEPA filters. Flammable gases or solvents may reach explosive
concentrations in the cabinet or ductwork. If you feel that the procedure requires
the use of an open flame or flammable materials, contact the institution’s safety
office.
The use of air or gases under high pressure should be avoided as they may
seriously disrupt the airflow patterns in the cabinet.
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