Zurn-roof-drain-calculator, roof drains from zurn include combination-primary overflow, control flow, dual outlet, siphonic, retrofit and more which cater from educational to commercial needs. Customize your savings potential. zurn delivers a great return on investment by reducing the annual cost of operating your facility. savings are achieved through water conservation and life-cycle savings., roof drain technical information. introduction/selection. product compliance/application. sizing data. connection types. general product information. options and .... Factors which affect proper roof drainage are deck slope, drain size, and placement of drains. the full flow capacity of a drain is not realized until the water reaches approximately 2.5" above the inlet in a four-inch drain and 3.5" in a six-inch drain., take the roof’s total square footage and divide by the total square footage handled by one drain. the result is the number of drains needed. for example: 50,000 / 4,400 = 11.36; or 12 drains required..

Roof drain to roof area sizing schedule use the above sketch in combination with the table of the variable rainfall rates below to determine the appropriate quantity, drain inserts for retrofit applications. the portals plus reroof drain is designed for the easiest and most reliable installation for use in conjunction with an existing drain when reroofing..

Zurn manufactures a complete line of roof drains including combination-primary overflow, control flow, dual outlet, siphonic, retrofit and more., rd7 roof drains conventional roof drainage systems 6.0 3.740 .0624 5.9 3.678 .0614 5.8 3.615 .0603 5.7 3.553 .0593 5.6 3.491 .0582 5.5 3.428 .0572 5.4 3.366 .0562. For si: 1 inch = 25.4 mm. does not include branches of the building drain.refer to table 710.1(1).; stacks shall be sized based on the total accumulated connected load at each story or branch interval.as the total accumulated connected load decreases, stacks are permitted to be reduced in size. stack diameters shall not be reduced to less than one-half of the diameter of the largest stack size ...