Watts’ RD-700 epoxy-coated cast-iron dual-outlet roof drain/overflow combination accomplishes primary and overflow drainage in a single roof penetration. Its design requires only half the total roof penetration competitive drains demand, the company states.
Watts overflow roof drains
![Watts overflow roof drains](http://www.supplyht.com/ext/resources/SHT/2016/May-2016/sht0516_Products_WattsWater.jpg?1464975149)