Field guide · Trades & Main Street
AI for Plumbing Pros
The water is already on the floor, and the smart shutoff cannot mop it up. This is the quoting, the explaining and the invoicing that fills your evenings.
Words for this work: plumber, plumbing, pipefitter, gasfitter, drain, water heater, backflow, service plumber, rough-in, sewer.
The short answer
For plumbing pros, the writing an AI chat tool is genuinely good at is the writing around the work rather than the work itself: writing quotes and explaining the repair, customer texts, dispatch messages, follow-ups, invoices, service agreements, payment chasing, review responses and complaint letters, job write-ups, parts lists, homeowner explanations, and the marketing you keep putting off. Chapter by chapter that is about eleven hours in a normal week — That’s eleven hours in a normal week — and more in the weeks that aren’t normal, which in this trade means a hard freeze or a holiday weekend. Your first week will be slower, because you’re learning a tool. By week three the numbers above are realistic, and they hold whether you run one van or six. Chapter 12 gives you the 30-day plan to get there.
What it does not do: your job. It does not writing quotes and explaining the repair for you without you reading it first. And it has one dangerous habit worth knowing before you type anything into it.
Where the hours go
Six blocks of writing, largest first, as the book counts them. The chapter each one is worked through in is on the right. These are the figures from this book's own promise page — the same table for all twenty-five books is on one page here.
- Writing quotes and explaining the repair~3 hoursChapter 4
- Customer texts, dispatch messages, follow-ups~2 hoursChapter 5
- The marketing you keep putting off~2 hoursChapter 9
- Invoices, service agreements, payment chasing~1.5 hoursChapter 6
- Job write-ups, parts lists, homeowner explanations~1.5 hoursChapter 8
- Review responses and complaint letters~1 hourChapter 7
That’s eleven hours in a normal week — and more in the weeks that aren’t normal, which in this trade means a hard freeze or a holiday weekend. Your first week will be slower, because you’re learning a tool. By week three the numbers above are realistic, and they hold whether you run one van or six. Chapter 12 gives you the 30-day plan to get there.
The eight kinds of writing
The 150 prompts in the book are grouped the way the work is grouped. It is the shape of a week for plumbing pros, whether or not you ever buy anything: if your week looks like this list, the tool has somewhere to start.
- 1–15Setup & Voice15 prompts
- 16–40Quotes & Estimates25 prompts
- 41–65Customer Communication & Emergencies25 prompts
- 66–85Money & Service Agreements20 prompts
- 86–105Reviews & Reputation20 prompts
- 106–120On the Job15 prompts
- 121–145Marketing & Growth25 prompts
- 146–150Admin & Momentum5 prompts
All 150 titles are listed free, and twelve are printed in full.
Three of the prompts, in full
Not a sampler: these are the three the book itself rates highest. Its promise page values six blocks of writing in hours, and these come from the three worth the most — one prompt each, printed as they stand. The bracketed parts are where you type; everything else is the wording. Nine more are printed in full on the prompt page for this book, and every one of the 150 is listed there by name.
“Turn my notes into a homeowner-ready quote: WHAT I FOUND, WHAT I RECOMMEND AND WHY, WHAT’S INCLUDED (only what I listed), WHAT’S NOT INCLUDED (drywall, paint, anything under a slab I haven’t opened). No warranty or code language I didn’t give you. Under 300 words. Notes: [VOICE RAMBLE].”
“The twelve texts I send over and over: booking confirmation, day-before reminder, on my way with an ETA, running late, job finished, quote follow-up, reschedule, after-hours auto-reply with what counts as an emergency, warranty acknowledgment, payment received, review ask. Under 45 words each, [BRACKETS] for the variables.”
“Write the emergency page for my site: what counts as a real emergency in plain terms (a burst line, sewage backing up, no water, a gas smell — call the gas company first), what to do in the four minutes before I get there (find the shutoff, kill power to the heater), my hours and after-hours rate [MY TERMS], how to reach a human. Nothing that shames anybody for calling.”
What to check, every time
Four kinds of box repeat through every task chapter. Two of them are the reason this is a book for plumbing pros and not a book about AI.
COPY THIS
a ready prompt. Copy it, change the [BRACKETED] parts, paste it in.
TRY IT NOW
a five-minute exercise using your own real work. Do these. They’re the whole point.
WATCH OUT
where the AI gets things wrong on this task, and the 60-second check that catches it.
RULES CORNER
the compliance flag: what never goes into a chat window, and why.
The words, in this trade
The plain-English AI vocabulary is on the series glossary. These are the ones specific to plumbing pros — where the tool meets the paperwork that already has a name.
- Token
- The chunks these tools count in, each about a short word. It matters only because it is the unit the daily limits and the monthly bill are measured in.
- Context window
- How much it can hold in front of it at once: everything you have pasted into this chat plus everything it has written back. It is a workbench. Fill it and the oldest items slide off the end, which is why a long, wandering chat starts forgetting your pricing.
- Hallucination
- The one habit that can cost you. It states a wrong thing — a price, a code section, a fixture count — in the same confident voice it uses for right ones, and there is no tell. The fix is the 60-second check: numbers, promises, rules.
- Custom instructions (profile)
- The settings box where you describe your shop once, using Prompt #1, so you stop retyping it at the start of every chat.
- AHJ (Authority Having Jurisdiction)
- Your inspector and the office behind them. The only voice that decides whether the work passes. A chat window is never that.
- Adopted code and local amendments
- The plumbing code your state or city actually adopted, plus every change they made to it. Nothing the AI writes outranks that document.
If you start on Monday
The order matters more than the effort. Chapter 1 is “Your Head Start”, and it is about what you already know. Chapter 2, “The 30-Minute Setup”, is thirty minutes of setup you do once. Chapter 3 is “How to Talk to It” — the one real skill, and everything after it assumes you have it. The last chapter, “Your First 30 Days”, is a dated plan rather than advice.
You can read the entire opening argument, The Water Is Already on the Floor, without buying anything: 2,007 words, about 9 minutes.
Questions people actually ask
Can AI do writing quotes and explaining the repair for plumbing pros?
It can write the draft; you still decide. This is the single biggest block of time in the trade — the book puts it at 3 hours a week in chapter 4 — and the prompt library gives it 25 worded prompts under “Quotes & Estimates”. The titles of all 150 are listed free.
Will AI replace plumbing pros?
No, and this series argues the opposite at length. It is a good tool for words: it does the writing around the job, not the job. The book's own line is “this book will not tell you AI is magic. It’s a power tool. It kicks. We’ll show you where.” The whole opening argument is free to read, 2,007 words, no sign-up.
What should never go into a chat window?
That question has its own box in every task chapter — the compliance flag: what never goes into a chat window, and why. — and its own chapter: The Rules You Can’t Afford to Break. The short version is that the compliance line for plumbing pros is not the same as the one for any other trade, which is why there are twenty-five books instead of one.
Do I need to pay for ChatGPT or Claude to do this?
Not yet. The free tiers carry you through every TRY IT NOW box in this book and your first few weeks of real use. You will know it is time to pay when you hit the daily limit in the middle of an ordinary workday, which is the tool telling you it has earned about $20 a month. Chapter 11 covers what the money buys.
How long before it actually saves time?
That’s eleven hours in a normal week — and more in the weeks that aren’t normal, which in this trade means a hard freeze or a holiday weekend. Your first week will be slower, because you’re learning a tool. By week three the numbers above are realistic, and they hold whether you run one van or six. Chapter 12 gives you the 30-day plan to get there.
The book this comes out of
AI on the Job: Plumbing Pros Edition
Twelve chapters, 150 copy-paste prompts, a glossary that assumes nothing, and a thirty-day plan to get there. Every figure on this page is from it.