Roof Leader Line

A downspout waterspout downpipe drain spout roof drain pipe leader is a pipe for carrying rainwater from a rain gutter.

Roof leader line.

In addition to their ornamental appeal he points out that leader heads. The water is directed away from the building s foundation to protect the foundations from water damage. 300 x 500 150 000 sq. Roof area is 300 x 500 ft.

The waste accumulated around the strainer would lead to block in the drainage of water. The above sizing data is offered as a guide only. Sizing a roof water drain. The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout.

To size the vertical roof drain for the same parameters 5 000 square feet of room area and 6 per hour of rain consult table 1106 2 figure 3. If outside roof leader lines connect to your combined house sewer outside your house the combining point each leader line drain must be trapped. A leader line is the last 3 20 feet of line that is connected to a hook or lure. It is connected to the mainline with a swivel or line to line connection such as the double uni knot.

Downspouts are usually vertical and usually extend down to ground level. The leader line can be a variety of materials including a fluorocarbon line nylon monofilament line multi strand cable single strand wire braided line or even. This drain is found on the roof and it connects the roof to an outlet pipe. Calculate drains needed.

Calculate total roof area. This table is based on zurn s roof drain vertical requirement for horizontal roof areas at various rainfall rates table. Otherwise sewer gas will escape between the roof leader line and where it enters the underground drain. When sizing roof drains the limiting factor for the amount of water each drain will carry away is the size of leader therefore increasing leader size decreases the number of drains required.

Take the roof s total square footage and divide by the total square footage handled by one drain. This reveals that the minimum size for the leader pipe is 5. The result is the number of drains needed. Section 101 5 of the ipc tells us not to reduce the pipe size in the direction of flow.

A trap for a leader line or area drain can be present either inside of outside the building. But this isn t the whole story. Buried or underground roof drainage downspout defects clogging overflowing holes corrosion leaks that cause wet basements or crawl areas proper installation of buried downspout extensions proper installation of french drains seepage pits at flat sites gutter downspout defects cause wet basements crawl areas questions answers about installing maintaining repairing buried roof.