Water heater replacement and installation in Chicago, IL

When a Chicago heater should be replaced, not fixed

Lake Michigan water sits in the moderately hard range, so a Chicago tank does not usually die of scale the way heaters do on Rockford or Peoria wells. What wears it out is workload. A burner that lifts 38°F February water to 120°F runs long cycles all winter, and after a dozen of those winters the steel lining, the gas control and the flue baffle are all tired at once. Most Chicago gas tanks we pull are somewhere between 10 and 14 years old.

Signs that a Bungalow Belt or two-flat heater has reached the end in this city:

• Rust-colored water from the hot taps only, which points at the tank lining rather than the city mains or your service line.
• Moisture or a rust ring under the burner door, often first spotted when someone moves storage boxes in a finished basement.
• A tank that keeps up in October but runs cold by mid-January, even after a flush, because the lake water has dropped into the 30s.
• Soot or scorching above the draft hood, a sign the old masonry chimney is no longer pulling exhaust up and out.
• A second big repair quote in two years on a heater past its tenth birthday, such as a gas valve after a thermocouple.

If two of those apply, a repair is usually money spent on a tank that will need replacing within a season or two anyway. In a Chicago garden unit the flooding risk tips the balance toward replacement earlier than it would in a house with an unfinished cellar.

Installed prices for a new water heater in Chicago

Chicago install prices sit above downstate Illinois because labor costs more in Cook County and because city jobs carry more paperwork and inspection time. A quote at the low end usually means a straight swap on a straight stairway with a chimney that passes a draft test. Quotes climb when the plumber has to carry the old tank up a narrow two-flat stair, reline a flue, or bring a new gas line from the meter for a tankless unit.

Sizing for Lake Michigan water in January

A Chicago heater is sized for its worst month, and that month is February, when lake water can reach the basement in the mid 30s. The figure to compare is the first-hour rating, listed on the yellow federal sticker, an estimate of the hot water a heater supplies during its busiest hour when it starts full. A family stacking three showers before the Blue Line commute should shop by that number, not by gallons of storage.

For tankless, the math is about flow at the winter temperature rise. Bringing 38°F water to 120°F is a rise of more than 80 degrees, and a whole-house gas unit rated near 199,000 BTU manages somewhere around 4.5 to 5 gallons per minute against that February lift. That covers two showers or a shower and a dishwasher in a bungalow, but not three fixtures at once in a two-flat. A plumber quoting the same unit for a Chicago home that would be sized for Atlanta has not done the winter math.

Tank, tankless or heat pump in a Chicago basement

Gas tanks remain the default in Chicago because nearly every bungalow and two-flat already has a Peoples Gas line and a flue in the basement. They are the cheapest to install, they keep working when ComEd power fails during a summer storm (atmospheric models need no electricity), and they recover well enough for most families once sized for the cold inlet water.

Tankless units suit Lincoln Park and Lakeview rehabs, small families, and homes where the basement has become living space and every square foot counts. The tradeoffs here are the gas line, which in many older houses is too small for a high-input unit, the sidewall venting a tankless model requires, and the yearly descale that Lake Michigan hardness calls for. Before committing in a Lakeview rehab, read comparing tank and tankless costs for the lifetime dollars.

Heat pump water heaters work in a roomy Chicago basement, but the space matters. They draw heat from the room air, so an unheated basement that falls into the 40s in January makes them lean on their backup elements and lose much of their savings. A basement that shares space with a furnace and stays in the 50s or 60s is a better fit. ComEd has offered efficiency incentives on heat pump models at times, and Peoples Gas has done the same for efficient gas units, so ask what is current before you choose.

What a code-compliant Chicago install includes

The City of Chicago runs its own plumbing code, separate from the Illinois Plumbing Code used in most suburbs, and a replacement has to be filed with the Department of Buildings. A like-for-like heater swap is generally handled through the department's Express Permit Program, which a licensed plumber files online. Work that changes the fuel, the venting or the gas piping, such as a tank-to-tankless conversion, may need more review. On a properly done Chicago job, expect:

• A draft test on the chimney with the new burner running, and a liner or a switch to power-vent if the flue spills exhaust.
• A new flexible gas connector or hard pipe, a shutoff valve within reach, and a sediment trap (drip leg) ahead of the gas control.
• A T&P relief line kept at full pipe diameter, ending just over the basement floor or the floor drain, never capped or reduced.
• An expansion tank where a check valve, backflow device or pressure-reducing valve closes the house off from the street main.
• A drain pan piped to a drain when the heater sits over a finished basement floor or in an upstairs utility closet.
• A working carbon monoxide alarm confirmed near the heater, which the city's express permit terms call out for fuel-fired units.
• Haul-away of the old tank, carried up the stairs and out to the van, with the steel recycled.

Seismic strapping, which West Coast codes require, is not part of a standard Chicago install. Ask your plumber for the Illinois license number and confirm the permit is on the written estimate; a heater swapped without one tends to come up later during a condo sale or a two-flat refinance.

How long a Chicago swap takes

A straight gas tank replacement in a Bungalow Belt basement is typically wrapped up within a morning or early afternoon, and a heater that quits on a weekday can usually be swapped before dinner when the right size is on the truck. Common 40 and 50 gallon models are stocked by Chicago supply houses, so the delay, when there is one, is usually about scheduling rather than parts.

The quote and the clock both stretch in a few Chicago situations:

• Steep two-flat and three-flat stairs where the old tank has to come up a turning back stair or through a gangway door.
• Shared basements in Pilsen, Albany Park or Humboldt Park where several heaters vent into one flue and the draft has to be checked for all of them.
• Chimneys orphaned by a furnace upgrade, which may need a stainless liner before the new heater can be lit.
• Tankless conversions, which add a day or more for gas line work, a wall penetration and condensate piping.
• Alley and street parking, especially on permit-parking blocks near the lakefront, which can add carrying time.

Jardine and Sawyer treatment, Bungalow Belt housing and polar vortex prep get their own coverage on our citywide guide to water heater help in Chicago.

Getting the most life from a new Chicago heater

A new tank in this city earns its full life with a few simple habits. Each October, drain off a bucketful through the bottom valve, so lake lime does not harden over the burner before the long January cycles start. Leave a clear ring around the burner, free of laundry baskets and storage bins, so it can breathe combustion air. And if the furnace or boiler is replaced later, ask the HVAC installer to check whether the water heater is left alone in the chimney, because that is how many Chicago venting problems start.

Our Chicago crews follow the same sequence described under how our crews run a heater swap, from the alley carry-out to the final relight.

Replacement near Chicago

Across the city line the rules change. Evanston, Oak Park, Skokie, Cicero and Berwyn each run their own building departments and permit desks, and most follow the Illinois Plumbing Code instead of Chicago's. The housing is familiar, brick bungalows in Berwyn and Cicero and older frame and brick homes in Oak Park and Evanston, so the sizing advice above holds. Your plumber's Illinois license carries across those borders, yet each town wants its own permit for the address.

Questions people ask