Illinois plumbing marketing that wins lead line jobs and keeps your license number on every ad

Illinois wants a plumber's license number on every ad. Leave it off and the fine is the smaller risk, because the state can take the phone number away.

The Illinois Plumbing License Law asks three things of anyone who advertises plumbing. A licensed plumber's license hangs at the place of business. The number on that license goes in every ad. It also rides with the plumbing name on your vehicles.

• It is the license number. Your yearly contractor registration is a separate filing. The ad rule points at the license on the wall, so use the number IDPH would read if it walked in.
• Every day counts. A wrong or missing number can bring a misdemeanor charge and a $1,000 fine, and the license can be suspended or revoked, IDPH's plumbing program page warns. Under the statute, each day the ad runs is its own offense.
• The phone line is at stake. For a printed ad that breaks the rule, IDPH can order the phone company to cut off the number. Calls to it are not forwarded to your new one.

That last point decides where we start. Old yard signs, fridge magnets, door hangers and directory listings get checked before any new campaign, because a number printed on years of paper is worth more than one season of ads.

Put the same number on each online profile you run, in every landing page footer and on any van wrap photo you post. The plumbing trade page covers what Google itself screens for.

Lead lines are not just a Chicago story. State law makes every community water system find and replace them, and that puts letters in mailboxes from Rockford to Springfield.

A water system that finds a lead line must try to tell the owner and every occupant within 15 days. Final replacement plans are due to the state by April 15, 2027. The largest systems, those reporting more than 99,999 lead lines, get up to 50 years at no less than 2% a year, under the lead service line law. Smaller systems get shorter deadlines.

The same law expressly bans partial replacement outside a short list of exceptions. When a line is replaced, it goes from the main to the first shut-off valve inside the building.

The private side is plumbing work. IDPH says service lines are plumbing under the license law, installed by people the law allows and inspected by a licensed plumber before use. Water systems reported 677,359 known lead lines in Illinois in 2019.

Outside Chicago, read your water system's plan before writing a word. A Naperville or Aurora page should name the local system, explain its letter and offer to check the service line where it enters the basement. Whether the system or the homeowner hires the plumber varies town by town, so the page says only what that town's plan says.

From January 1, 2027, a long arrival window comes with a phone call. A plumber who promises that in ads now is ahead of a rule every competitor will soon follow.

The Service Appointment Fairness Act covers any visit that needs the customer home. You give the customer an estimated arrival time. If the window is wider than two hours, someone phones no later than an hour before arrival with a set time, and a voicemail will do. Skip that call, or show up more than 30 minutes after the stated time, and a customer who is out owes no fee at all.

We read it as aimed at trip charges and no-show fees, not at what the repair costs. Booking texts, dispatcher scripts and any AI phone answering should be set up for it before the January cold.

Bigger jobs carry their own paper. Under the Home Repair and Remodeling Act, plumbing fixtures and sewers count as home repair, while maintenance, service or repairs under $500 do not. For work over $1,000, the Home Repair and Remodeling Act wants a signed written contract before anyone starts. The Illinois state page covers the consumer rights pamphlet that goes with it.

A buyer 65 or older who signed at home with an uninvited door-to-door seller can cancel within 15 full business days. That summary is not legal advice, so confirm with counsel before you change a contract.