# An AI agent that writes plumbing follow-up texts > The best time to earn a repeat plumbing customer is the day after the job. In this lesson you build an n8n agent for Blue Maple Plumbing. Source: https://learn.ynteractive.com/content/visual/plumber-follow-up-texts · Updated 2026-10-19 · Free from Stepthrough (https://learn.ynteractive.com) [Step-by-step guide](https://learn.ynteractive.com/content/visual#format-steps-carousel) · 7 slides · [n8n](https://learn.ynteractive.com/content/tool/n8n) By [Robert Breen](https://learn.ynteractive.com/content/about) · Published October 19, 2026 · From the free lesson [Build an AI Customer Follow-Up Agent for Plumbers](https://learn.ynteractive.com/content/plumber-customer-follow-up-ai-agent-n8n) The best time to earn a repeat plumbing customer is the day after the job. In this lesson you build an n8n agent for Blue Maple Plumbing. Swipe or scroll sideways for all 7 slides. The whole guide is written out below. ## The guide in text With a care tip that fits the exact job. ## Step by step 1. ### Tell the agent who you are Blue Maple Plumbing's system prompt lists its real services, a friendly, plain tone and one rule: never invent prices, discounts or warranty terms. 2. ### Type in today's calls Linda, water heater replacement. Tom, main drain cleaning. Maria, sump pump. The agent writes three texts, each under 60 words. 3. ### A care tip for each job Linda: give the new heater about an hour to heat up. Tom: don't flush wipes, even "flushable" ones. Maria: pour a bucket of water into the pit before the next big storm. 4. ### A next step for the office A yearly tank flush in 12 months. A sewer camera inspection if the drain clogs again. A battery backup before storm season. 5. ### Say "save those" Each text becomes a row in the Customer Follow-Ups sheet, marked Ready to send. Businesses and people in the examples are made up. The steps, screens and wording come from the free lesson and the Stepthrough glossary and prompt library. ## Do it yourself, free **Build an AI Customer Follow-Up Agent for Plumbers**. Build an AI agent for Blue Maple Plumbing that writes personalized follow-up messages after service calls and tracks them in Google Sheets — chat trigger, AI Agent, system prompt, model, memory, and… You do every step yourself in a practice copy of n8n, it checks your work as you go, and “Do it for me” finishes any step you get stuck on. Free, and nothing touches your real accounts. [Start the free lesson](https://learn.ynteractive.com/modules/n8n-ai-agent-plumbing) [Or read the full step-by-step guide](https://learn.ynteractive.com/content/plumber-customer-follow-up-ai-agent-n8n) ## Related terms Plain-English definitions, each with an example from a free lesson. A/B testing · [AI agent](https://learn.ynteractive.com/content/glossary/ai-agent) · [API key](https://learn.ynteractive.com/content/glossary/api-key) · [Append row](https://learn.ynteractive.com/content/glossary/append-row) · [Buyer persona](https://learn.ynteractive.com/content/glossary/buyer-persona) · [Chat Trigger](https://learn.ynteractive.com/content/glossary/chat-trigger) · [Customer acquisition cost (CAC)](https://learn.ynteractive.com/content/glossary/customer-acquisition-cost) · Foundation model [The full AI glossary](https://learn.ynteractive.com/content/glossary) ## Related prompts - [Case study interview questions prompt](https://learn.ynteractive.com/content/prompts/case-study-interview-questions-prompt): Plan a client interview that gets a case study's before, during and after story in their own words, with follow-up probes and… - [Email subject lines prompt](https://learn.ynteractive.com/content/prompts/email-subject-lines-prompt): Get ten honest subject lines for a finished email, each with preview text and a character count, grouped by approach so you can… - [SEO meta description prompt](https://learn.ynteractive.com/content/prompts/seo-meta-description-prompt): Write short search-result descriptions for your web pages: what the page offers, who it is for and one reason to click, inside… - [Social post ideas prompt](https://learn.ynteractive.com/content/prompts/social-post-ideas-prompt): A four-part ChatGPT prompt for social post ideas built on your services and real customer questions: platform, hook and call to… [All free prompt templates](https://learn.ynteractive.com/content/prompts) ## From the blog - [AI Chatbot for Plumbers: What to Answer, What to Hand Off](https://learn.ynteractive.com/content/blog/ai-chatbot-for-plumbers): What an AI chatbot can do for a plumbing company: answer hours and prices, collect emergency details, book visits, and when it must hand off to a person. - [AI for Plumbing Companies: Emergency Requests, Triaged](https://learn.ynteractive.com/content/blog/ai-for-plumbing-companies): AI for plumbing companies: a request form whose AI dispatcher marks each job Emergency, Same-day or Scheduled, logs it and emails next steps. - [Automate Customer Follow-Ups After Every Service Call](https://learn.ynteractive.com/content/blog/customer-follow-up-after-service-call): Customer follow-up after a service call, done every time: an n8n AI agent drafts each message with a job-specific tip and saves it for review. ## More visual guides - [ChatGPT: New Chat or Same Chat? Decide in 6 Steps](https://learn.ynteractive.com/content/visual/ladder-new-chat-or-same-chat): A step-ladder guide to ChatGPT context: stay in the same chat when the job is the same, start a new chat for a new customer, and check the numbers. - [Summarize a meeting transcript with ChatGPT](https://learn.ynteractive.com/content/visual/meeting-recap-steps): A meeting transcript is useful for about five minutes, and then nobody reads it again. - [5 Steps to Build a Shareable Price Calculator in Claude](https://learn.ynteractive.com/content/visual/5-steps-claude-artifact-price-calculator): A visual guide to Claude artifacts: ask for a price calculator, check the math, ask for one change and share it by link. Five steps, free. [All visual guides](https://learn.ynteractive.com/content/visual) · [All free tutorials](https://learn.ynteractive.com/content)