Historical
ANSI/ASSE 1055-2009
Performance Requirements for Chemical Dispensing Systems
Chemical dispensing systems provide a means of mixing potable water with chemicals to provide the user with a chemical solution which is ready for use. The amount of dilution shall be fixed or adjustable. This standard applies to those devices classified as chemical dispensing systems having a self-contained means of backflow protection. The devices shall be classified as follows: (a) Type A: These devices have the chemical(s) pressurized above atmospheric pressure; and (b) Type B: These devices do not pressurize the chemical(s) above atmospheric pressure. The only source of back pressure comes from an elevated hose.
Content Provider
American Society of Sanitary Engineering [asse-sanitary]
