22 Plumbing
22.60.00 Gas and Vacuum Systems for Laboratory and Healthcare Facilities
22.61.00 Compressed-Air Systems for Laboratory and Healthcare Facilities 22.62.00 Vacuum Systems for Laboratory and Healthcare Facilities 22.63.00 Gas Systems for Laboratory and Healthcare Facilities 22.66.00 Chemical-Waste Systems for Laboratory and Healthcare Facilities 22.67.00 Processed Water Systems for Laboratory and Healthcare Facilities