Roof Water Drain Pipe

This article describes several methods for determining the drainage capacity required to safely drain water off of building roofs whether from rainfall melting snow or a combination of those water sources.

Roof water drain pipe. Cast iron roof drain with 2 in. We describe online roof drainage requirements calculators pertinent plumbing standards a table approach to looking up roof drainage. Install a french drain one of the top yard drainage solutions to divert water away from problem areas. Draining water away from your home starts with installing a sound gutter system that has extensions to carry the water away from your home.

Use this downspout extension to divert water away from the foundation or connect to drainage pipe and catch basin to control drainage. The first step in sizing a roof drain is to calculate the surface area of the roof that the drains will be covering as well as the average hourly rainfall rate at the building location. We regularly get asked about the water flow capacity of different pipe sizes and which is the best roof drain for a specific pipe size. Watts drainage products rd 300 r series 4 in.

The flexible design easily bends and holds its shape and can be extended from 25 in. The down pipe can terminate in a shoe and discharge directly onto the surface but using modern construction techniques would be connected through an inspection chamber to a drain that led to a surface. Sizing a roof water drain. Without adequate drainage excess water can damage your roof walls foundation and landscaping.

The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout. Featuring durable vinyl construction this extension can be buried bent or connected to additional sections. Blockages in the under floor drain combined with high volumes of roof runoff water entering the system send the entire roof runoff into the building basement or crawl space debris flowing down the downspout drain leaves from gutters can block floor drains or even the main building sewer line leading to sewage backups into the structure. Roof drainage requirements specifications.

Water collected by a rain gutter is fed usually via a downpipe also called a leader or conductor from the roof edge to the base of the building where it is either discharged or collected.