Public Works

350 South 5th Street
RM 203 City Hall
Minneapolis, MN  55415-1390

Disconnection Information for Single-Family Homes and Duplexes

Permit Required

A permit is required before disconnection work can begin. There are no fees for a Rainleader Disconnection permit. Download a Residential Permit Application (pdf).

Inspection Required

The disconnection must be approved by the City. Be sure to schedule an inspection with the City after disconnection work is completed but before it is concealed. Call (612) 673-5899 to set up an inspection.

Below are some estimated costs for disconnection of typical roof drains for residential buildings. These estimated costs do not include the cost of any or all permits. These estimates are from Fall 2013.

Cost Estimate - Residential Downspout Connection 



10 foot steel downspout

$14.00 each

Front elbow or side elbow

$4.00 each

Downspout strap

$2.00 each

10 pound bucket of quick setting cement

$7.00 each


4 inch soil pipe gasket

$6.00 each

4 inch cast iron blind plug

$18.00 each

Actual labor time per disconnection: 45-60 minutes

Doing It Yourself

Download our easy-to-follow printer-friendly Disconnect Your Downspout guide:

How to Disconnect Your Downspout


Materials Required

Plus – Choose a cast-iron or cement plug

For a cast-iron plug:

For a cement plug:

A Step-by-Step Primer on Disconnecting your Downspout


Installing a cast-iron blind plug

a. Most standpipes are 3"-5" in diameter. Measure to ensure getting the correct size.

b. Fit rubber gasket into the bell end of the standpipe.

c. Paint a thin layer of gasket lubricant on the exposed surface of the gasket and the outside of the cast-iron plug.

d. Place the plug inside the lip of the gasket. Use a wood block to protect the cast-iron from the impact of the hammer.

e. Use the 8-pound sledgehammer and one solid strike to force the plug into the gasket. Use care as cast iron may break with too much force.

Installing a cement plug

a. Compress a bundle of fiberglass insulation and force it into the standpipe (always wear protective gear when you work with fiberglass).

b. Firmly pack the insulation down inside the pipe (with a stick or tool) approximately six inches (6").

c. Mix the cement according the directions. Be sure to use protective gloves when working with cement.

d. Pour cement into the standpipe and form a smooth, crowned top.

e. Dispose of any remaining cement appropriately. DO NOT dump cement into gutters or storm drains.


Hiring a Contractor to Disconnect your Downspout


Last updated Jun 2, 2014