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Plumbing & heating · Milwaukee · Since 1952
Kowalczyk & Sons
Stan, Mike and Danny. Three generations, one phone number.
Copper and white pipework, valves and a circulator pump above a boiler against a yellow wall
A boiler room on the South Side, last winter

Your house is old. So are we.

Seventy-four years fixing the plumbing and heating in Milwaukee’s bungalows, duplexes and Polish flats. Cast iron, galvanized, steam boilers and lead service lines. Whatever is behind your basement wall, we’ve opened up one like it.

OfficeMon–Fri, 7 to 5
No heat?Any hour, any day
LicensedWI Master Plumber #48813
The house you live in

We know your house before we see it.

Milwaukee built the same few kinds of houses for sixty years, and each one has the same few problems. Tell us which one you live in and we can usually guess what we’ll find.

Bungalow

1910s–1930s
  • Cast iron stack in a closet wall
  • Galvanized supply, low pressure upstairs
  • Clay lateral out to the street

Polish flat

1890s–1920s
  • A cottage jacked up for a basement unit
  • Two kitchens on one stack
  • Drains sized for one family, serving two

Upper & lower

1900s–1940s
  • Two of everything, one main
  • Steam or hot-water boiler in the basement
  • Shared shutoffs nobody can find

East Side Victorian

1880s–1900s
  • Lead service line from the curb
  • Old steam heat, one-pipe
  • Three remodels of plumbing in one wall

What we look for in each one →

Three generations

The “& Sons” is not a figure of speech.

An older man standing in a workshop in front of a wall of tools
1971

Stan Kowalczyk

Walter’s son. Ran the shop for thirty-eight years. Semi-retired, still answers the phone on Saturdays and still knows every boiler on Lincoln Avenue.

A man in glasses and a plaid shirt cutting wood with a router
2009

Mike Kowalczyk

Stan’s son and the master plumber on the license. Does the estimates, the boilers and anything involving a cast iron stack.

A young man in safety glasses and gloves driving a nail with a hammer
2024

Danny Kowalczyk

Mike’s son, second-year apprentice, registered with the state. If you get Danny, you also get Mike.

“My grandfather opened the shop with one truck and a pipe threader. We still have the threader. We also still do it the way he did: you see the problem before you pay to fix it.” Mike Kowalczyk

How we bill

By the hour, and we’ll tell you why.

Flat-rate pricing works when every job looks the same. In a 1920s house, nothing does. A drain that should take an hour sometimes turns out to be a cracked hub behind plaster, and a flat price has to charge everybody for that possibility. Hourly means you pay for what your house actually needed.

Before we open a wall or cut a pipe, we tell you what we think it is and roughly how long it takes. If it turns out bigger, we stop and call you.

$95to come out, anywhere in the city
$145an hour, the first hour in full
¼hour billing after that, never rounded up to the hour
Lead service lines

Is your water line made of lead?

A lot of Milwaukee houses built before the 1950s still get their water through a lead pipe from the curb. You can usually check it yourself in about a minute, in the basement where the water line comes through the wall.

  1. Find the pipe coming through the front wall, before the meter.
  2. Scratch it gently with a key or a coin.
  3. If it’s soft, dull grey and the scratch turns shiny silver, and a magnet won’t stick, it’s probably lead.

Milwaukee Water Works runs a replacement program for the part on your property, and what it costs you depends on the program’s current funding. Call them first. If you’d rather hire us directly, we coordinate the city side with them. More on lead lines →

The scratch test

What you’re likely looking at, by what the scratch shows:

LeadSoft, dull grey, scratches shiny silver. Magnet won’t stick.
GalvanizedHard, dull grey, threaded fittings. A magnet sticks.
CopperScratches the color of a new penny.
PlasticWhite, blue or black. Usually means it’s been replaced.
On the bench

Iron, brass, copper and patience.

A row of old boiler pipes and valves in a boiler room
Two-pipe steam, Bay View
Two copper pipes run up an open plaster wall
New copper, old plaster
Two pipe wrenches on a black background
Walter’s wrenches
Old brass gate valves on green-painted pipes
Gate valves, 1938
A row of plumbing rough-ins between studs against an old brick wall
A bath rough-in, Walker’s Point
What the neighbors say

Some of them since the sixties.

Stan fixed my mother’s boiler in 1984. Mike fixed mine last winter. Same company, same honesty, and they still show up when they say.
Carol W. · Bay View
Mike explained exactly why the stack was leaking before he touched it, gave me a time estimate, and came in under it.
Tom J. · Washington Heights
No heat on a Sunday in January, ten below. Danny and his dad were here in two hours. Worth every dollar of the after-hours charge.
Anna & Luis P. · Lincoln Village
Call(414) 555-0131
Mon–Fri, 7 to 5. No-heat calls any hour.
Writeoffice@kowalczykplumbing.com
Or use the form
LicensedWisconsin Master Plumber License #48813 (Mike Kowalczyk).
Licensed in the City of Milwaukee.
A Yeti Trades Co. portfolio site

The old-house plumber’s site, built in seven days.

Sixteen pages: house types drawn by hand, three generations of the family, an honest hourly rate explained, and a lead service line page written for Milwaukee.