Before ChatGPT and similar tools existed, brainstorming a list of blog topics for a plumbing website took real research time. Today, a large language model can generate a list of hundreds of topics in seconds.
That speed creates a new risk. An unfiltered AI-generated topic list produces posts with no confirmed search demand and no connection to what the plumber knows firsthand.
Publishing a large volume of that kind of content tends to dilute a site’s overall quality signal rather than build it, because most of the posts end up saying the same generic things already covered, and better, elsewhere on the web.
The topics below solve the first problem: they come with current search volume and intent data pulled from a live keyword research tool (Semrush). The rest of this article addresses the second problem: what separates a topic worth writing from one that isn’t, in a search landscape now shaped by AI Overviews.
Key Takeaways
- AI Overviews now answer most informational searches directly on the results page, so a plumbing blog post competing on generic “how to” content alone will struggle to earn clicks.
- Word count and publishing frequency are not ranking factors, according to Google’s own content guidelines. What matters is whether a post fully answers the question, no more, no less.
- The strongest topics are the ones built around information gain: something the plumber knows firsthand that isn’t already sitting in the top 10 results.
- Below are 241 plumbing blog topics with current search volume and intent, pulled fresh from SEMrush and organized by category.
- Blogging works best as one piece of a broader local SEO approach rather than a standalone strategy. A comparison of where it fits against other tactics is included further down.
Editor’s Note
Blogging in its old form of publish a post, wait for keyword rankings, and collect traffic is a much less reliable path than it used to be.
The bar for what makes a post worth publishing has moved. A topic list with real search volume behind it is still useful for finding what people are actually searching for. What’s changed is that the post itself now needs to offer something an AI summary can’t already give the searcher, which is covered in detail below.
241 Plumbing Blog Topics (Full List)
The topics below come from a fresh SEMrush pull (September 18, 2026), organized into three categories that reflect how plumbing search demand actually clusters: fixtures and toilets, water heaters, and septic/disposal/water treatment systems.
Each entry includes monthly search volume and search intent (informational or commercial), which is a more useful signal for topic selection than volume alone.
Toilets, Sinks & General Fixtures
| Blog Topic (Keyword) | Monthly Search Volume | Search Intent |
|---|---|---|
| how to use a plunger | 4,400 | Informational |
| how to fix a clogged toilet | 3,600 | Informational |
| toilet leaking at base | 3,600 | Informational |
| toilet tank not filling | 2,900 | Informational |
| why does my toilet keep running | 2,900 | Informational |
| how to shut off water to house | 2,400 | Informational |
| how to fix a clogged sink | 1,900 | Informational |
| toilet not flushing all the way | 1,900 | Informational |
| what to do if your pipes freeze | 1,900 | Informational |
| how to tell if you have hard water | 1,600 | Informational |
| water heater pressure relief valve leaking | 1,600 | Informational |
| how long do sump pumps last | 1,300 | Informational |
| no hot water in shower | 1,300 | Informational |
| toilet keeps clogging | 1,300 | Informational |
| why is my water heater leaking | 1,300 | Informational |
| how does a grease trap work | 1,000 | Informational |
| how to tell if your septic tank is full | 1,000 | Informational |
| kitchen sink clogged tried everything | 1,000 | Informational |
| toilet won’t stop running | 1,000 | Informational |
| electric vs gas tankless water heater | 880 | Commercial |
| does reverse osmosis remove minerals | 720 | Informational |
| why is my garbage disposal leaking | 720 | Informational |
| why is my tap water cloudy | 720 | Informational |
| does drano damage pipes | 590 | Informational |
| how to clean a showerhead | 590 | Informational |
| toilet gurgles when flushed | 590 | Informational |
| toilet tank filling slowly | 590 | Informational |
| best toilet paper for plumbing | 480 | Commercial |
| how to find a water leak in your house | 480 | Informational |
| how to test sump pump | 480 | Informational |
| what causes a faucet to drip | 480 | Informational |
| what is hydro jetting | 480 | Informational |
| how does water filtration work | 390 | Informational |
| how to flush toilet when water is turned off | 390 | Informational |
| how to test home water pressure | 390 | Informational |
| signs your water heater is going to explode | 390 | Informational |
| symptoms of a clogged drain vent pipe | 390 | Informational |
| toilet leaking between tank and bowl | 390 | Informational |
| what size hot water heater do i need | 390 | Informational |
| what to do when toilet overflows | 390 | Informational |
| why does my toilet smell like sewer | 390 | Informational |
| best temperature for water heater | 320 | Commercial |
| no cold water in shower | 320 | Informational |
| what is pex piping | 320 | Informational |
| what size sump pump do i need | 320 | Informational, Commercial |
| why is my toilet sweating | 320 | Informational |
| common plumbing issues | 260 | Informational |
| does vinegar and baking soda clean drains | 260 | Informational |
| shower drain backing up | 260 | Informational |
| slab leak symptoms | 260 | Informational |
| water pressure drop | 260 | Informational |
| how to tell if your toilet is leaking | 210 | Informational |
| repiping house on slab | 210 | Informational, Commercial |
| toilet flushes twice | 210 | Informational |
| toilet water level too high | 210 | Informational |
| why does my bathroom sink smell | 210 | Informational |
| why is my toilet flushing slowly | 210 | Informational |
| do green copper pipes need to be replaced | 170 | Informational |
| how long does cast iron pipe last | 170 | Informational |
| signs you need a new toilet | 170 | Informational |
| toilet running every few minutes | 170 | Informational |
| toilet water level too low | 170 | Informational |
| how often should a toilet be replaced | 140 | Informational |
| do plumbers do gas lines | 110 | Informational |
| how long does a water pressure regulator last | 110 | Informational |
| how to fix a leaking hose bib | 110 | Informational |
| how to fix a smelly garbage disposal | 110 | Informational |
| garbage disposal problems and solutions | 90 | Informational |
| how to tell if drain field is failing | 90 | Informational |
| symptoms of high water pressure in house | 90 | Informational |
| slab leak repair options | 70 | Informational |
| shower mixing valve problems | 50 | Informational |
| toilet water wont go down | 50 | Informational |
| how long does hydro jetting take | 40 | Informational |
| how to increase water pressure in a house | 40 | Informational |
| is hydro jetting better than snaking | 40 | Informational, Commercial |
| toilet bubbling when shower drains | 40 | Informational |
| toilet handle has to be held down to flush | 40 | No Intent Classification |
| why does my toilet randomly flush | 40 | No Intent Classification |
| do you need a plumber to install a sump pump | 30 | Informational |
| how to cover outside pipes for freeze | 30 | No Intent Classification |
| losing water pressure in shower | 30 | Informational |
| toilet bubbling when washing machine drains | 30 | No Intent Classification |
| what is good water pressure for a well | 30 | No Intent Classification |
| what type of shower valve do i have | 30 | No Intent Classification |
| why isn’t my water working | 30 | Informational |
| can tree roots damage water pipes | 20 | No Intent Classification |
| does hydro jetting remove roots | 20 | No Intent Classification |
| how hard is it to install water heater | 20 | No Intent Classification |
| how often should you hydro jet your sewer line | 20 | No Intent Classification |
| how to diagnose plumbing problems | 20 | No Intent Classification |
| unexplained puddle of water on floor | 20 | No Intent Classification |
| what type of pipes are used in new homes | 20 | No Intent Classification |
| why do my drains keep clogging | 20 | No Intent Classification |
| why does my drain keep backing up | 10 | No Intent Classification |
| signs of a main sewer line clog | 0 | No Intent Classification |
Water Heaters
| Blog Topic (Keyword) | Monthly Search Volume | Search Intent |
|---|---|---|
| how long does a water heater last | 6,600 | Informational |
| bathtub faucet leaking | 4,400 | Informational |
| tankless water heater vs tank | 4,400 | Commercial |
| water heater leaking from bottom | 4,400 | Informational |
| why is my water pressure low | 2,400 | Informational |
| water heater leaking from top | 1,900 | Informational, Commercial |
| outdoor faucet leaking | 1,600 | Informational |
| hot water smells like rotten eggs | 1,300 | Informational |
| how long do tankless water heaters last | 1,300 | Informational |
| why does my shower drain smell | 1,300 | Informational |
| low hot water pressure | 1,000 | Informational |
| water heater pilot light keeps going out | 1,000 | Informational |
| why is my water heater making noise | 880 | Informational |
| how long do copper pipes last | 720 | Informational |
| water heater keeps tripping breaker | 720 | Informational |
| when should you replace a water heater | 720 | Informational |
| water heater popping noise | 590 | Informational |
| what causes water hammer | 590 | Informational |
| what should house water pressure be | 590 | Informational |
| hot water runs out quickly | 480 | Informational |
| pex vs cpvc | 480 | Commercial |
| how long does pex pipe last | 390 | Informational |
| how long does pvc pipe last | 390 | Informational |
| how to get rid of sewer smell in house | 390 | Informational |
| sewer camera inspection cost | 390 | Informational |
| water heater whistling | 390 | Informational |
| faucet leaking from base | 320 | Informational |
| how to stop water hammer | 320 | Informational |
| does my water heater need an expansion tank | 260 | Informational |
| how often should sewer lines be cleaned | 260 | Informational |
| water heater not getting hot enough | 260 | Informational |
| cloudy hot water from faucet | 210 | Informational |
| faucet handle hard to turn | 210 | Informational |
| faucet leaking under sink | 170 | Informational |
| how long do sewer lines last | 170 | Informational |
| how long does galvanized pipe last | 170 | Informational |
| how often should you flush a water heater | 170 | Informational |
| trenchless sewer repair vs traditional | 170 | Commercial |
| what is pipe bursting | 170 | Informational |
| why do pipes whistle | 170 | Informational |
| why does my sink gurgle | 170 | Informational |
| low cold water pressure | 140 | Informational |
| water heater banging noise | 140 | Informational |
| condensation on water pipes | 110 | Informational |
| low water pressure in one faucet | 110 | Informational |
| low water pressure upstairs | 110 | Informational |
| repair or replace water heater | 110 | Informational |
| tankless water heater not getting hot enough | 90 | Informational |
| frost free hose bib leaking | 70 | Informational |
| signs of a broken sewer line | 70 | Informational |
| water heater not working after power outage | 70 | Informational |
| what is pipe lining | 70 | Informational |
| why are my pipes making noise | 70 | Informational |
| low water pressure throughout house | 50 | Informational |
| sudden increase in water pressure | 50 | Informational |
| why does my faucet whistle | 50 | Informational |
| copper vs cpvc | 40 | Commercial |
| water coming up shower drain | 40 | Informational |
| what does a water pressure regulator do | 40 | Informational |
| what is a water heater anode rod | 40 | Informational |
| can a tankless water heater run out of hot water | 30 | No Intent Classification |
| copper vs pex plumbing | 30 | Informational |
| faucet won’t turn off | 30 | No Intent Classification |
| shower won’t get hot | 30 | Informational |
| signs of a hidden water leak | 30 | No Intent Classification |
| water heater pilot light won’t light | 30 | Informational |
| why are my pipes sweating | 30 | No Intent Classification |
| why does my faucet sputter | 30 | No Intent Classification |
| bathtub faucet won’t turn off | 20 | No Intent Classification |
| expansion tank vs pressure tank | 20 | No Intent Classification |
| how often should you replace an anode rod | 20 | No Intent Classification |
| shower faucet won’t turn off | 20 | No Intent Classification |
| shower goes cold after a few minutes | 20 | No Intent Classification |
| shower head dripping after turned off | 20 | No Intent Classification |
| shower head has low water pressure | 20 | No Intent Classification |
| signs of a bad water pressure regulator | 20 | No Intent Classification |
| water coming up sink drain | 20 | No Intent Classification |
| why do pipes vibrate | 20 | No Intent Classification |
| why does my hot water take so long | 20 | No Intent Classification |
| why does my tankless water heater keep shutting off | 20 | No Intent Classification |
| sewer smell coming from drain | 10 | No Intent Classification |
| shower temperature keeps changing | 10 | No Intent Classification |
| water heater burner won’t stay lit | 10 | No Intent Classification |
| how to tell if water heater has sediment | 0 | No Intent Classification |
| outdoor faucet won’t turn off | 0 | No Intent Classification |
| sewer line replacement vs repair | 0 | No Intent Classification |
| signs your house needs repiping | 0 | No Intent Classification |
| what happens if you don’t flush your water heater | 0 | No Intent Classification |
Septic, Garbage Disposal, Water Treatment & Pipes
| Blog Topic (Keyword) | Monthly Search Volume | Search Intent |
|---|---|---|
| why does my water smell like rotten eggs | 2,900 | Informational |
| how long do garbage disposals last | 1,900 | Informational |
| how often should a septic tank be pumped | 1,900 | Informational |
| how to prevent frozen pipes | 1,900 | Informational |
| what temperature do pipes freeze | 1,900 | Informational |
| how long do septic tanks last | 1,600 | Informational |
| how long do water softeners last | 1,300 | Informational |
| garbage disposal humming but not spinning | 1,000 | Informational |
| how long does it take pipes to freeze | 590 | Informational |
| water softener vs water filter | 590 | Commercial |
| garbage disposal won’t turn on | 480 | Informational |
| what can you put down a garbage disposal | 480 | Informational |
| do i need a water softener | 390 | Informational |
| sump pump running constantly | 390 | Informational |
| water softener vs reverse osmosis | 320 | Commercial |
| plumbing maintenance checklist | 260 | Informational |
| why is my tap water yellow | 260 | Informational |
| garbage disposal smells like sewage | 210 | Informational |
| how often should a sump pump run | 210 | Informational |
| sump pump not turning on | 210 | Informational |
| why does my tap water smell like chlorine | 210 | Informational |
| why is my tap water brown | 210 | Informational |
| garbage disposal backing up into other sink | 170 | Informational |
| pedestal vs submersible sump pump | 170 | Commercial |
| why does my water taste metallic | 170 | Informational |
| black specks in tap water | 140 | Informational |
| septic tank vs sewer system | 140 | Informational, Commercial |
| signs of septic system failure | 140 | Informational |
| what is considered a plumbing emergency | 140 | Informational |
| why does my septic tank smell | 140 | Informational |
| sump pump making loud noise | 110 | Informational |
| how long does it take to repipe a house | 90 | Informational |
| white particles in tap water | 90 | Informational |
| septic tank backing up into house | 70 | Informational |
| sump pump smells bad | 70 | Informational |
| whole house water filter vs reverse osmosis | 70 | Informational, Commercial |
| garbage disposal keeps tripping reset button | 50 | Informational |
| can a plumber detect a water leak | 40 | Informational |
| garbage disposal draining slowly | 40 | Informational |
| signs you need a water softener | 40 | Informational |
| sump pump won’t turn off | 40 | Informational |
| battery backup vs water powered sump pump | 20 | No Intent Classification |
| can heavy rain cause septic problems | 20 | No Intent Classification |
| do i need a backup sump pump | 20 | No Intent Classification |
| how do plumbers find underground leaks | 20 | No Intent Classification |
| how often should plumbing be inspected | 20 | No Intent Classification |
| how to winterize your plumbing | 20 | No Intent Classification |
| septic tank full after pumping | 20 | No Intent Classification |
| signs your sump pump is failing | 20 | No Intent Classification |
| what should you not put in a septic tank | 20 | No Intent Classification |
| why is my sump pump pit dry | 20 | No Intent Classification |
| why is my water bill suddenly so high | 20 | No Intent Classification |
| why is the ground wet around my septic tank | 20 | No Intent Classification |
| how to tell if a frozen pipe burst | 0 | No Intent Classification |
| is hard water bad for plumbing | 0 | No Intent Classification |
| should you turn off water when going on vacation | 0 | No Intent Classification |
| what should you never put down a garbage disposal | 0 | No Intent Classification |
How to Use Keywords as Blog Topics
Picking a topic from the table above is not just a matter of sorting by volume. A structured approach produces better results:
- Start with Informational-intent topics for blog content. Commercial-intent keywords (like “tankless water heater vs tank”) are usually better served by a service or comparison page.
- Treat volume as a floor and with a grain of salt. A topic with 90 monthly searches that the plumber can answer with a specific, firsthand detail often outperforms a 2,000-volume topic that every competitor has already covered the same way.
- Match each topic to a real job the company has actually done. A post about “slab leak symptoms” written by a plumber who has diagnosed slab leaks in the local market carries information the searcher can’t get from a generic AI summary.
- Link every post to the most relevant service page. This is covered in more detail below and is one of the few tactics in this list that hasn’t changed with AI search.
A handful of topics further down each list show very low volume, in the 10 to 50 range. That doesn’t mean nobody is searching for them. Google has stated that roughly 15% of daily searches have never been seen before, a figure the company has held steady since it first reported it in 2013.
Keyword tools can only report volume for searches they’ve already measured, so a topic showing near-zero volume in SEMrush isn’t necessarily a topic nobody is typing into Google.
In Plumbing Webmasters’ own publishing history, some of the better-performing posts have come from exactly these low-volume topics, particularly when the post answers the question with a specific detail rather than a generic explanation.
How Long Should My Blog Posts Be?
Word count is not a Google ranking factor. Google’s own content guidelines state directly that it does not have a preferred word count for ranking purposes, and specifically warns writers against targeting a word count because they’ve heard Google wants one.
That doesn’t mean length is irrelevant to the reader. A post needs enough words to fully answer the question it’s targeting, and no more. A quick fix like “how to use a plunger” might only need 400 to 600 words to be genuinely useful.
A more involved topic like “signs your water heater is going to explode” may reasonably run longer if there’s real safety information to cover. Include a short summary near the top of the post that answers the core question directly, since most searchers want the answer before they read the full explanation.
Where Should I Link My Blog Posts?
Link each post to the most relevant service page for that topic. A post about slab leak symptoms should link to the slab leak repair service page, for example. This moves a blog reader from general information toward a specific service the company offers, which is the actual purpose of publishing the post in the first place.
How Frequently Should I Publish Blog Posts?
Publishing frequency itself is not a ranking factor. The same Google content guidelines cited above state plainly that adding or removing content specifically to make a site appear “fresh” does not improve rankings.
What does matter is whether the site’s content comprehensively covers the topics its target customers actually search for. A plumbing company publishing one well-researched, firsthand post a month will generally outperform one publishing ten generic posts a week.
There’s no fixed cadence to hit. The better question is how many of the high-value topics from the list above the company can realistically cover with genuine, specific detail.
Why Blogging’s Traffic Value Has Changed
Blog posts built purely around informational keywords are worth less as a standalone traffic source than they were even two years ago.
The mechanism is AI Overviews. When Google shows an AI Overview at the top of a results page, searchers click a traditional result 8% of the time, compared to 15% of the time when no AI Overview appears, according to a 2025 Pew Research Center study that tracked actual browsing behavior. For a generic “how to” post that AI Overviews can summarize directly, the click-through opportunity has roughly been cut in half.
This makes information gain increasingly important. Google holds a patent for scoring content based on information gain, a measure of how much new information a page adds beyond what’s already indexed for a given query, as described by Search Engine Land’s 2023 analysis of the patent.
A post that restates the same generic advice already sitting in the top 10 results, and already summarized in an AI Overview, has little reason to be clicked or cited. A post built around a specific job the plumber actually diagnosed, a detail specific to the local water supply, or a repair approach the company has used repeatedly in the field is the kind of content an AI summary can’t fully replace.
In practice, this means the highest-value topics on the list above are the ones a plumber can answer with something firsthand: a specific brand or model encountered often in the field, a local water condition that changes how a repair is done, or a mistake seen repeatedly on past jobs. Generic definitional topics (“what is hydro jetting”) still have a place, but they carry more weight when the post includes a detail pulled from real jobs rather than a rewritten definition.
Who This List Works Best For (and Who Should Wait)
This approach to blog content assumes a few things: an existing, indexed website; some existing search visibility to build on; and enough job volume to generate firsthand detail across many topics. Not every plumbing business is in that position yet, and the guidance changes depending on where a business actually stands.
Solo operators and owner-run shops. Publishing ten posts a month isn’t realistic without a marketing team, and it isn’t necessary either. Pick five to ten topics from the list that match jobs done often, the calls that come in every week rather than the rare ones, and write one detailed, firsthand post per topic. A short list of posts that genuinely reflect what the business handles daily will do more for search visibility than a long list of generic ones.
New or low-authority websites. A brand-new site has no track record for Google to weigh a blog post against, and no existing traffic for a blog post to build on. Prioritizing core service pages before blog content generally produces faster, more reliable results for a site with no existing footprint, since those pages capture the commercial-intent searches that are closer to an actual booked job. Blog topics still matter for a new site, but they work better as a second phase once the core service pages are live, indexed, and receiving at least some search traffic of their own.
Budget-constrained shops. Blogging done well is genuinely time-intensive, since it depends on firsthand detail rather than generic rewriting, and firsthand detail takes time to gather and write accurately. For a shop with limited hours to spend on content, a smaller number of well-researched posts tied to the highest-volume, highest-intent topics on the list will produce better results than a larger volume of thin, generic posts. Quality and specificity matter more here than coverage of the full list.
Where Blogging Fits Against Other SEO Tactics
Blog content works best as one part of a broader local SEO approach. Here’s how it compares to the other tactics a plumbing company typically has available:
| Tactic | What It’s For | Typical Timeline | Best Fit |
|---|---|---|---|
| Blog posts (informational) | Answering specific customer questions, building topical coverage | Weeks to months, longer with AI Overviews reducing clicks | Sites with existing authority and firsthand job detail to draw on |
| Google Business Profile posts | Local visibility tied directly to the map pack | Days | Any business with an active, claimed GBP listing |
| Service pages | Converting a searcher with clear commercial intent | Weeks, once indexed | Any business, and generally the first priority for a new site |
| Review generation | Building trust signals tied to the business listing | Ongoing | Any business, most effective when built into the customer follow-up process |
A new website with no blog content still needs strong service pages and an active Google Business Profile before blog posts will move the needle.
An established site with strong service pages and consistent reviews is the better candidate for the kind of firsthand blog content described above, since blog posts on that kind of site have an existing base of trust and traffic to build on rather than starting from zero.
None of these four tactics fully replaces the others. Service pages capture the searcher who already knows they need a plumber.
Google Business Profile posts reach the searcher scanning the map pack for someone nearby.
Reviews build the trust signal that turns a map pack impression into a call. Blog content, when built around information a competitor can’t easily replicate, gives a site the topical depth and firsthand detail the other three tactics don’t provide on their own.
Final Thoughts
A blog post that repeats generic advice already summarized by an AI Overview is unlikely to earn a click or a citation. A post built around a specific detail from a real job, tied to a topic with confirmed search demand, still has a place in a plumbing company’s SEO strategy.
The 241 topics above are a starting point rather than a list of topics you must publish in full. The better use of the list is as a filter: find the topics that overlap with jobs the company already does often, and write detailed blog posts about those.
Author: Nolen Walker
Nolen Walker is the founder of Plumbing Webmasters and the creator of DataPins™, a Local SEO platform for plumbing companies. He has over 16 years of experience helping plumbing businesses grow through organic search, Google Maps, and AI-driven visibility.
Nolen is the author of A Complete SEO Guide for the Plumbing Small Business Owner. He also hosts The Plumbing SEO Podcast on Spotify.
