The drain may be used to redirect water after it reaches a certain level or serve as a means of effectively maintaining a certain level of any type of liquid in place as part of the manufacturing process.
Purpose of roof overflow drain.
An overflow drain is also used in manufacturing plants and other commercial assembly operations.
Where you have roof drains you are also required to have overflow drains.
Overflow drains shall be the same size as the roof drains with the inlet flow line two inches above the low point of the roof and shall be installed independent from the roof drains.
Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs.
The 2006 international residential code specifies the size and locations for overflow drains on residential structures.
If a blockage occurs after the connection to the overflow drain the overflow is useless and defeats the purpose.
Combination main overflow drain commercial construction commercial multi family thin wall construction.