Siphonic roof drains

This standard establishes minimum requirements and provides guidelines for the proper design, installation, examination, and testing of siphonic roof drains.  It includes definitions of terms and parameters involved in the proper design of siphonic drainage systems.
It is not the intent of this Standard to specify that a drain of a given diameter must drain a minimum or 
maximum amount of water.  It is the intent of this standard to provide standardized test procedures to ensure that drain products are evaluated equally.
This Standard does not dictate minimum flow or depth performance criteria for siphonic roof drains.  Instead, it specifies standard test procedures to be performed on siphonic roof drain products to document their actual performance and physical limits.  This data is to be made available in manufacturer literature for use by 
designers for selecting the drain product and entering performance characteristics into design calculations.