Plumber in Harper Woods, MI

Most plumbing work in Harper Woods happens in houses built in one burst after World War II. The census puts the median home at 1955, nearly half the city’s homes went up in the 1950s, and 84 percent are single-family houses. The water mains under the streets are the same age: the city’s asset management plan dates 46 percent of its 46 miles of main to the 1950s and 27 percent to the 1940s, all cast iron or ductile iron. Storm runoff here goes to the Milk River drain, a Wayne County system that empties toward Lake St. Clair. That puts a lot of 70-year-old pipe, inside and out, in a small city along I-94.

Cast iron water mains from the 1940s and 1950s under Harper Woods streets

The city’s 2025 water report counts 5,671 service lines, 50 of them lead and 1,500 still of unknown material, and says it will keep identifying them through 2026. Water comes from GLWA’s Detroit River intakes, and the city’s Water Department and DPW run the pipe from there. The asset management plan notes that Harper Woods had replaced just over 3 miles of main since 1990, with its last main project finished in 1998.

Inside the houses, that era usually means a cast iron stack and building drain, a clay or cast iron lateral, and copper or galvanized supply lines. Storm water has its own route. The Milk River Intercounty Drain, set up in 1908 and run by its own intercounty drainage district, takes storm runoff from Harper Woods and St. Clair Shores to a retention treatment basin. From there it is pumped to the county’s Northeast Sewage Disposal System, and in major storms the overflow is screened and disinfected before release to the Milk River. A slow floor drain is usually a drain cleaning job in the house, not a sign of trouble at the basin. The census estimate shows nothing built here since 2000, so even the newest house in town has plumbing more than 25 years old.

Vernier, 8 Mile and Hoover Road from our Warren office

Harper Woods is southeast of our office on Stephens Rd. We come down Hoover Road to 8 Mile, head east, and follow Vernier Road into the city near I-94. Calls here get grouped with other work on the east side and in Eastpointe, and we tell you on the phone where yours falls in the day.

In a 1950s house we start with the floor drain and main cleanout, then the water meter and the line coming through the foundation, since the city still lists 1,500 services as unknown. If cleanings keep coming back, the next step is a camera, and our article on cast iron drain pipe problems explains what that usually finds. Permits and rental inspections go through the Building Department at the municipal building, where construction plans are reviewed before permits are issued.

The DPW yard on 8 Mile is the office to call about anything on the city side: a main break, a street sewer backing up for the whole block, or a question about your service line in the inventory. The municipal building on Harper handles the permit side of a repair inside the house. The Milk River drain itself answers to a drainage board chaired by Michigan’s agriculture director or a designee, with the Wayne and Macomb county drain commissioners as members, so decisions about the basin are made across the county line.

See every city we serve around Warren · More Wayne County cities · Cast iron drain pipes and the signs they're failing · Floor drain plug or backwater valve for sewer backups

Last updated October 25, 2026