Roof Drain Disconections

If you are improperly connected to the sanitary system the high flow of relatively clean storm water coming off your roof can cause the sanitary sewer system to overflow.

Roof drain disconections.

A possible sanitary sewer overflow can cause sewer backups and basement flooding. Proper roof drain connection. Using tools from the international plumbing code ipc it s not that hard. Depth of excavation utilities present storm drain access storm drain main location in relation to building traffic concerns soil conditions etc.

Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs. Installation charge will vary depending on work site conditions. You may have more than one option for directing each downspout. Be at least 10 of the roof area that drains to the downspout you are disconnecting.

Improper roof drain connection why is roof drain disconnection important to you. A large source of clear water within the combined sewer is from rain that falls on your roof and is collected by downspouts that are directly connected to the sewer system. Illegal roof drains sump pumps and foundation drains connected to the city s sanitary sewer system sends groundwater to the sewer treatment plant consuming expensive wastewater treatment capacity. Smith carefully designs and manufactures a full line of roof drains deck drains scupper drains promenade and parking area drains and more to satisfy both the artistic eye of the architect and the calculating mind of the engineer.

Roof drains must be firmly secured to the roof with an underdeck clamp otherwise due to snow loads rain loads and reg ular expansion and contraction the drain will work in and out of the roofing causing roofing membranes to flex and fail. Ipc provides four steps to size the roof drains on a building. Determine 100 year 1 hour rainfall rate used for location of building. During rainstorms this additional clear water can overwhelm sewer pipes and mmsd s treatment plants which can lead to street flooding basement sewage backups and sewage overflows directly into our neighboring waterways.

Contact an outside sewer and water contractor to evaluate the site and design a plan for disconnecting from the sanitary sewer and connecting to the storm drain in the street. Consider combining elbows and extensions to send water to the side or front yard or to. Brittle tar will crack and leaks will occur. For example to drain 500 square feet of rooftop there should be at least 50 square feet of landscape.

Getting water off a building s roof is important but how do you know what size drain to use to provide adequate drainage.