Section 10.21 - Vacuum Powered Sanitary Drainage Systems(1)General. 248 CMR 10.21 shall include all fixtures, piping, connections, vacuum equipment, associated tanks and the method of receiving discharge from or discharging to a conventional drainage system as regulated in 248 CMR 10.15. (a) Vacuum drainage systems may be designed by a Massachusetts professional engineer.(b) Vacuum drainage systems shall be installed in accordance with the equipment manufacturer's installation instructions.Amended by Mass Register Issue 1331, eff. 1/27/2017.Amended by Mass Register Issue 1510, eff. 12/8/2023.