Parts Of A Roof Drainage System

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.

Parts of a roof drainage system.

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. Has two adjoining gutters cut on 45. Connects troughs to keep the water flow off the roof and away from the property. The upper part of the vertical soil stack provides the venting component of the dwv system.

If you follow it upward the vent stack penetrates through the roof of your home where it is open to the outside air. An interior drain has several components. A watertight ring holds the drain and strainer together around the roofing membrane and prevents. Connects the gutter to the downspout.

Secondary or emergency roof drainage is required wherever the buildup of water is detrimental to the roof structure. The vent allows the entire drain system to maintain equal air pressure. Roof drainage system considerations part 2 september 2020. Cast iron roof drain with 2 in.

It is also called a clamp collar clamp ring or flashing ring. The end part that closes the gutter so that water or stray debris won t flow out. Watts drainage products rd 300 r series 4 in. Secondary drainage shall be provided through the use of sidewall scuppers or internal roof drains.

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. No hub cast iron high volume roof drain with ductile iron dome. Watts drainage products rd 300 r series 6 in. Boot a transitional pipefitting used to convert and connect a drain s downspout to the building s storm system.

In either case the discharge shall be located so that it is readily visible by building occupants. And not to do anything that can cause the roof to hold more water either during or after a rainfall than it was. Roof water drain types and sizing sizing a roof water drain. 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.

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. Dome strainer or cover. The top of the interior drain is a mesh or strainer that prevents debris from entering the. Flashing or clamp ring.