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Plumbing Code 225-4 Milwaukee Code of Ordinances

The following code is from the City of Milwaukee Code of ordinances adopted 11/27/01. It describes the specific steps and criteria for disconnecting from a downspout drainage system.

PLEASE NOTE: If you are under orders to repair or replace anything related to your existing downspout drainage system, nothing in this code will relieve you from that order. You must comply with all orders in the time period stated on the order.

225-4. Drainage of Yard Areas and Roofs.

1. UNDERGROUND DRAINS. All underground drains from roof rainwater leaders, paved areas, yards, courts and subsurface drains shall be mechanically connected to a storm sewer or combined sewer when they are available and abutting the property, except that such drains may discharge in an approved manner into an adjacent lake, river or stream, provided they are not in conflict with the rules of the Milwaukee metropolitan sewerage district.

2. ROOF RAINWATER LEADERS (CONDUCTORS). a. Except buildings described in subd. 1, all roof rainwater leaders on all buildings and structures shall be mechanically connected to the storm sewer, combined sewer or to an approved storm sewer facility when they are available and abutting the property. This shall include parcels that have access by easement or private roads when the storm sewer is available at the point of access.

a-1. Single- and 2-family dwellings and detached buildings accessory to single or 2-family dwellings may discharge roof rainwater leaders, conductors or downspouts to finished grade. All discharges to finished grade for reasons of non-connection or disconnection of a previously connected system must meet all of the following provisions:

a-1-a. The point of discharge must be a minimum of 2 feet from a basement or a foundation wall or alley property line and 5 feet from all other property lines.

a-1-b. The discharge must flow parallel to or away from the nearest property line.

a-1-c. The discharge water shall not discharge to a street, alley or other public way.

a-1-d. The discharge water shall not create an icy condition on any pedestrian walkways within or adjacent to the subject premises lot lines.

a-1-e. The downspout hub shall be sealed with a 1" concrete cap or in a manner approved by the commissioner.

b. When a storm sewer or combined sewer is not available, the roof rainwater leaders, conductors or downspouts shall discharge to grade and must meet all of the following provisions:

b-1. The point of discharge must be a minimum of 2 feet from a basement or a foundation wall or alley property line and 5 feet from any other property line.

b-2. The discharge must flow parallel to or away from the nearest property line.

b-3. The discharge water shall not discharge to a street, alley or other public way.
 

b-4. The discharge water shall not create an icy condition on any pedestrian walkways within or adjacent to the subject premises lot lines.

c. No conductor, roof rainwater leader or downspout shall be used as a support for any part of a building, structure or appendage to same.

d. Outside Rainwater Leaders. All outside roof leaders (conductors) installed under or in the ground shall be installed as regulated in s. Comm 82.36, Wis. Adm. Code. Conductors shall terminate with an approved pipe above grade. The sheet metal conductors shall be connected and sealed to the pipe in an approved manner. Roof leaders (conductors) connecting to the storm building drain in the basement shall be of an approved pipe material to a point at least 2 feet inside the basement foundation wall. Roof leaders (conductors) shall be maintained in good repair and free of stoppages.

e. Detached Buildings. As regulated in s. 252-71, private detached accessory buildings not more than 1000 square feet in area do not need their rainwater leaders connected to an approved storm sewer facility.

f. Previous Construction. Except for buildings described in par. a-i, all existing buildings constructed prior to the installation of abutting storm main sewers shall have their roof rainwater leaders, conductors, downspouts and sump pumps connected to a newly installed abutting storm main sewer. Sump pump discharge pipes shall be installed as regulated in s. 225-8. The connection of rainwater leaders, conductors, downspouts or sump pump discharge pipes to the curb or gutter is prohibited.

g. Rainwater Leaders (Conductors). Rainwater leaders in the combined sewer area shall not discharge into a catch basin or sand interceptor. The sewer from the rainwater leader shall bypass the catch basin or sand interceptor and shall have a direct connection to the sewer system.

h. Previous and New Construction. Roof water leaders on all buildings and structures with a roof area of 500 square feet or less may discharge to finished grade provided all of the following provisions are met:

h-1. The point of discharge must be a minimum of 2 feet from a basement or foundation wall or alley property line and 5 feet from all other property lines.

h-2. The discharge must flow parallel to or away from the nearest property line.

h-3. The discharge water shall not discharge to a street, alley or other public way.
 

h-4. The discharge water shall not create an icy condition on any pedestrian walkways within or adjacent to the subject premises lot lines.
 

h-5. The downspout hub shall be sealed with a 1" concrete cap or in a manner approved by the commissioner.
 

Last update 4/29/01




 


Department of Neighborhood Services
Plumbing Code 225-4 Milwaukee Code of Ordinances