Parts Of A Roof Drainage System

A watertight ring holds the drain and strainer together around the roofing membrane and prevents.

Parts of a roof drainage system.

If you follow it upward the vent stack penetrates through the roof of your home where it is open to the outside air. No hub cast iron high volume roof drain with ductile iron dome. Boot a transitional pipefitting used to convert and connect a drain s downspout to the building s storm system. Cast iron roof drain with 2 in.

Drain ring a metal ring placed around the drainpipe to secure the roof drain to a surface such as a roof deck or parapet wall. The top of the interior drain is a mesh or strainer that prevents debris from entering the. Watts drainage products rd 300 r series 4 in. Secondary or emergency roof drainage is required wherever the buildup of water is detrimental to the roof structure.

Has two adjoining gutters cut on 45. The vent allows the entire drain system to maintain equal air pressure. Secondary drainage shall be provided through the use of sidewall scuppers or internal roof drains. Roof water drain types and sizing sizing a roof water drain.

In either case the discharge shall be located so that it is readily visible by building occupants. Flashing or clamp ring. Conventional gutter systems such as those used on most houses are suitable for some low slope roofs. Connects troughs to keep the water flow off the roof and away from the property.

It has an angled outer wall that directs the flow of water into gutter sections. Some a c installers use an aluminum downspout to cover the refrigerant and condensate lines that are routed from an attic mounted air handler down to an outdoor. The first step in sizing a roof drain is to calculate the surface area of the roof that the. By mike silvers cprc frsa technical director mon sep 21 2020 the core of that article stressed the importance of not reducing the size of any type of roof drainage.

Don t mistake as part of the roof drainage system an aluminum downspout that has been used as a cosmetic cover for hvac refrigerant lines as we illustrate in our photo at below left. And not to do anything that can cause the roof to hold more water either during or after a rainfall than it was. Watts drainage products rd 300 r series 6 in. The end part that closes the gutter so that water or stray debris won t flow out.

An interior drain has several components. The upper part of the vertical soil stack provides the venting component of the dwv system. A substantial portion of the rdca product portfolio is made up of specification driven half round gutter round downspout large custom gutter large k style and 3 4 and 4 5 heavy gauge corrugated downspout. Roof drainage system considerations part 2 september 2020.