Open Perplexity and type the question a homeowner might ask at 10 on a Sunday night: “Who can fix a slab leak tonight near Chula Vista?” The answer might name two or three plumbing companies, with numbered citations underneath. See whether your company is one of them, and which pages the citations point to.
To get your plumbing company recommended by ChatGPT and Perplexity, in San Diego or anywhere else, let their search crawlers reach your site, say plainly what you fix, where and when, keep your listings identical, and earn reviews and mentions that describe real jobs. Nobody can buy or guarantee a spot in the organic answer.
The homeowner typing that slab leak question has a warm patch on the hallway tile and hears water running with every faucet off. She’s stressed and it’s late, so she taps one of the companies, skims a review and calls. The answer has narrowed her choice before she opens a single plumber’s website.
How do ChatGPT and Perplexity decide which plumber to recommend?
Neither platform publishes a formula. Both can search the web while answering, and the pages they find and cite shape who gets named. A plumbing company can influence those pages.
OpenAI’s help page on searching the web with ChatGPT says ChatGPT may search automatically “when your question would benefit from current information” and can use location information to find local results. Its answers may include citations. The page also says results are ranked on multiple factors and that “placement is not guaranteed.”
Perplexity’s help center says it searches the internet in real time and that each answer includes numbered citations linking to the original sources. When Perplexity names a plumber, the homeowner can see which review page or directory the answer leaned on. So can you.
You can’t buy a place in the organic answer on either platform. OpenAI’s January 16, 2026 post on advertising says “Ads do not influence the answers ChatGPT gives you.” Perplexity’s November 2024 post on advertising says its answers “will not be influenced by advertisers.” Anyone guaranteeing a plumbing company an AI recommendation is promising something OpenAI and Perplexity don’t offer.
If you run more than one trade, our guide to generative engine optimization for home service businesses covers HVAC, roofing and electrical companies too.
Can ChatGPT and Perplexity actually read your plumbing website?
OpenAI and Perplexity both recommend allowing their search crawlers if you want your site to appear in their search results, and each search crawler is separate from the platform’s other bots.
In October 2026, OpenAI’s crawler documentation and Perplexity’s crawler documentation described the crawlers below. OpenAI’s page also listed OAI-AdsBot, which only visits pages submitted as ads on ChatGPT.
| Crawler | What it’s for, per the platform | Effect of a robots.txt block |
|---|---|---|
| OAI-SearchBot | Surfacing sites in ChatGPT search | Site left out of ChatGPT search answers (navigational links may still appear) |
| GPTBot | Collecting content that may train OpenAI’s models | Signals your content shouldn’t be used for training; separate from search |
| ChatGPT-User | Visiting a page when a user’s request calls for it | Robots.txt may not apply; not used to decide search eligibility |
| PerplexityBot | Surfacing and linking sites in Perplexity results, not model training | Managed through robots.txt; Perplexity recommends allowing it so your site appears in its search results |
| Perplexity-User | Fetching a page when a user’s question calls for it | Generally ignores robots.txt, since a user requested the page |
Robots.txt is only one layer. A security plugin, hosting firewall or CDN bot protection can turn crawlers away even when robots.txt allows them. OpenAI’s search help page says your host or CDN must allow its published search bot IP addresses, and Perplexity says sites behind a web application firewall may need to explicitly allow its bots by user agent and IP range. Have your host check both, then confirm the visits in your server logs.
Keep your service area and hours in plain page text, too. Neither platform’s crawler documentation promises its bots will read a service-area map saved as an image or hours posted in a PDF. The same goes for a town list that only loads through a script.
Does your site say plainly what you fix, where, and when?
A homeowner’s question is specific: slab leak, tonight, Chula Vista. The pages that help most answer all three in plain words. “Quality plumbing solutions for all your needs” gives a homeowner, or a search system, nothing to match.
Give each job type its own page:
- slab leak detection and repair
- water heater repair and replacement, tank and tankless
- sewer line inspection and repair
- drain cleaning and hydro jetting
- repiping
- emergency service, if you really offer it
Emergency and planned work need different pages because the reader’s state of mind differs. Someone with sewage coming up the tub drain wants your number and hours on the first screen. Someone planning a water heater replacement wants options, process and cost factors, and will likely compare a few companies first.
List the towns your trucks actually drive to: “Chula Vista, National City, Bonita and Imperial Beach,” not “Serving all of Southern California.”
Post your real hours. If you aren’t open around the clock, don’t claim 24/7; a homeowner who calls at 11 p.m. on that promise and hits voicemail won’t call back. Show your contractor license number exactly as it appears on your license, too. It’s a fact the homeowner can check, which removes one reason to hesitate.
Are your business facts the same everywhere AI tools look?
Your company name, phone, address, hours and services should match on every listing a homeowner might reach from an AI answer. A mismatch gives a nervous customer a reason to pause right when you want the phone to ring.
Check Google Business Profile, Yelp, BBB, Angi, Nextdoor, Apple Maps (through Apple Business Connect), Bing Places and any trade or manufacturer directory that lists you. Plumbing companies tend to trip on the same things:
- an old call-tracking number from a lead service
- the legal name on one listing and a DBA on another
- a shop address from before a move
- duplicate listings from a past marketing vendor
- “water heater” or “sewer line” missing from one profile’s services
If a Perplexity answer cites a directory page that shows a disconnected number, the homeowner calls the next name. Search for your company on each platform once a quarter and fix what you find.
Why do reviews and third-party mentions matter more than your own claims?
Anyone can call their company a trusted local plumber. A stranger’s review or a local news story is evidence the homeowner doesn’t have to take on faith, and a cited answer puts that evidence one tap away.
The most useful reviews describe a specific job in a specific place. A review that mentions the slab leak found under a hallway in Eastlake, and how the line was rerouted, says far more than five stars and “great service.” To get reviews like that without scripting them:
- Ask right after the job, while the relief is fresh.
- Text the customer a direct link to your profile.
- Ask them to say, in their own words, what was wrong and what your crew did.
Don’t write, buy or cherry-pick reviews, and read each platform’s review policy before you ask.
Outside mentions worth pursuing:
- local news coverage, such as your crew helping neighbors after a storm or a water main break
- certified installer locators from the manufacturers whose equipment you install
- trade association and chamber of commerce member directories
- “best plumbers in San Diego” pages from local publications
To pick targets, put your customers’ usual questions to Perplexity and ChatGPT and note what they cite. If the same directories keep appearing for “water heater replacement in Escondido,” those are the pages to get onto.
Which homeowner questions should your site answer?
Answer the questions people ask right before they decide whether to call: what’s happening, how serious it is, whether they can handle it and what drives the price.
- Is a warm spot on the floor a sign of a slab leak?
- My water heater is leaking from the bottom. Should I turn it off?
- Can I snake the main line myself, or do I need a camera inspection?
- What affects the cost of replacing a water heater?
Answer cost questions even if you never publish prices. Explain what moves a quote: tank or tankless, gas or electric, where the heater sits, venting, and the permits and code upgrades your city requires. A homeowner who understands why quotes differ feels less exposed asking for one.
Give straight answers to do-it-yourself questions. A page that shows how to close the main shutoff valve, and lists the signs that mean the homeowner shouldn’t wait, earns more trust than a “call now” banner. If your advice gets a homeowner through tonight, there’s a good chance they’ll call you for the bigger job.
For phrasing and page structure, see our guide to optimizing a plumbing website for AI voice search.
How can you check whether ChatGPT and Perplexity recommend you today?
Ask both tools what your customers would ask, on a schedule. A fixed prompt set, run monthly, shows where your company is named or missing and which sources shape the answers.
- Write 15 to 25 prompts that pair your services with your towns, in urgent and planning versions, such as “emergency plumber open now in La Mesa” or “who repairs slab leaks in Chula Vista.”
- Run each prompt in both tools from a logged-out or fresh session, and name the city. OpenAI says ChatGPT can use location information for local results, so where you test can change the answer.
- For each answer, log whether you’re named and every page it cites, your site included.
- Repeat the set monthly and run each prompt more than once, since the same question can come back with different companies.
Then line those results up with real calls and form fills. Our guides to tracking referral traffic from ChatGPT and Perplexity and how to measure GEO cover the analytics side.
Your monthly prompt log won’t settle which fix got you named. Neither platform publishes a formula, and the same prompt can return different companies from one run to the next. If your company starts showing up after a month of listing cleanup and a new slab leak page, either one could be the reason, or neither.
Frequently asked questions
Should I block GPTBot if I want ChatGPT to recommend my plumbing company?
Blocking GPTBot does not remove a site from ChatGPT search, according to OpenAI’s crawler documentation. GPTBot collects content that may be used to train OpenAI’s models, while OAI-SearchBot makes a site eligible for ChatGPT search answers. A plumbing company can allow OAI-SearchBot and block GPTBot, because OpenAI treats the settings separately.
Do homeowners really use ChatGPT or Perplexity to find a plumber?
Some homeowners do, and the reliable way to know how many of your customers do is to measure it. Check your analytics for visits from ChatGPT and Perplexity, and ask every new caller how they found you. Treat AI visibility as an addition to your local SEO and Google Business Profile work rather than a replacement.
How long does it take for changes to show up in ChatGPT or Perplexity?
Robots.txt changes are the only part with a published timeline. OpenAI says about 24 hours for ChatGPT search results, and Perplexity says up to 24 hours. Changes to pages, listings and reviews have no published timeline, so judge them with a monthly prompt check rather than day to day.
Do ChatGPT and Perplexity recommend the same plumbers?
Not necessarily. ChatGPT and Perplexity are separate products that search, rank and cite sources in their own ways, so a plumbing company named by one can be missing from the other. Run your prompt set in both tools and log each one’s results separately, including which pages it cites for your area.
How we can help
Golden Seller has run SEO and paid search for San Diego businesses since 2013, and we hold Google Partner status. For a plumbing company that wants to come up when homeowners ask ChatGPT or Perplexity for help, we start by checking your robots.txt rules for AI crawlers. Then we run a prompt set built on your services and towns in both tools to show where you’re named or passed over for a competitor, and which pages the answers cite. From there we fix listing mismatches, write the service and question pages you’re missing, and rerun the same prompts each month. Read more about our GEO and AI marketing work. Nobody can promise you an AI recommendation, but we can show you where you stand today. Call (855) 853-3456 or contact us to talk it through.
