What restaurant owners ask about grease traps
— and the Reddit thread that ranks first.

Ask Google how often a grease trap should be pumped, and on 1 October 2026 the first result in both the United States and Canada was not a pumping company, a city, or a manufacturer. It was a thread on Reddit’s r/restaurantowners, where kitchen operators compare notes.

We should say one thing up front. Groundline sells short explainer films — a 30-to-45-second film that answers one of these questions — so we have a reason to look at this. What follows is what we measured, and it holds whether or not you ever buy one.

The questions, with the numbers

These are the customer-side grease trap questions we measured, as monthly searches averaged over the twelve months to August 2026.

The volumes are smaller than for geothermal or water wells. But look at who is asking. Our reading, not a measurement: “What is a grease trap” and “grease trap vs grease interceptor” read like the questions of somebody opening a kitchen, reading a lease, or facing an inspection for the first time.

Note the last row, too. The exact phrasing “how often should a grease trap be pumped” has no volume estimate reported in either country, so its demand is unknown. The same question asked as “cleaned” gets 140 in the US. These are separate Google estimates for related phrasings, and we cannot tell how much the people searching them overlap.

Who answers “how does a grease trap work”

We pulled the first page of Google for “how does a grease trap work” in the United States. It had a video block with three videos:

Southwest EFC, the Southwest Environmental Finance Center at the University of New Mexico. Seattle Public Utilities, the city’s utility, with part three of a series on grease interceptors. And Imperial Brady, which describes itself on its own website as a distributor of foodservice packaging, commercial cleaning supplies and janitorial equipment.

The written results were Wikipedia, suppliers such as WebstaurantStore and PlumbingSupply.com, a UK company, an engineering firm, and several grease collection, rendering and service companies. The “People also ask” box held: “How often do grease traps need to be pumped?”, “How does a grease trap get emptied?”, “What happens if there is no grease trap?” and “Do floor drains go to a grease trap?”

A university center, a city utility and a supply distributor. All reasonable sources. None of them is the company that would actually come and pump the trap.

The question where a Reddit thread ranked first

We pulled “how often should a grease trap be pumped” in the United States and Canada, twice each on 1 October 2026. All four pulls put the same result first: “Grease Trap Cleaning Frequency”, a thread on r/restaurantowners.

Below it in the US came a grease collection company’s FAQ, a sanitary board, Roto-Rooter, a Facebook post, a few other companies and a page listing cleaning frequency by municipality. The Canadian page was similar, with a Canadian plumbing company in the mix.

The video block on both pages held three items: two videos from Waster, an Australian waste and recycling company whose services include grease trap cleaning, and a Facebook video from a cleaning service called Happy Housekeepers, whose location we have not established.

The follow-up questions in the US were: “How much does it cost to have a grease trap pumped?”, “How to tell when a grease trap is full?”, “How long should a grease trap last?” and “Do grease traps need to be pumped out?”

A thread, not a company

We cannot see inside Google’s ranking, so we cannot tell you why it ranked first.

Rules differ from city to city (our page on how we work with grease trap companies says more), and this article sets no pumping schedule.

The questions come before the emergency, too. On 2 August 2026 we pulled the questions Google shows across this topic and found kitchens asking whether they legally need a grease trap at all — that is in the section on the questions kitchens ask before anything goes wrong.

What a short answer looks like

Here is our demo film for the grease trap trade. Quillfern Grease Service is a business we made up to show the format; it is not a client. Its question is how a kitchen knows when its grease trap needs pumping — close to the “how to tell when a grease trap is full?” question above.

Two more, made for the founder’s own grease trap directory rather than for a client. One answers whether a kitchen needs a grease trap at all. The other answers a cost question without quoting a price, by explaining why pump-out quotes differ.

None of these was tested in Google’s video block, and we are not suggesting any of them would appear there. They are here so you can judge the format for yourself.

Where a grease trap company has something to add

The utility, the university and the distributor can explain what a grease trap is. A local operator can explain its own service area, how it quotes, and the local program it works under. On the pages we checked, the only grease trap service with its own video was Waster, in Australia; the one other cleaning service in a video slot was a Facebook post whose location we have not established.

Pick the question you answer on the phone most often. Answer it in forty seconds, honestly, including “it depends” where it does. A film is one way to do that. A written explanation on your website is another. If you are weighing up a film, we have set out what an explainer video actually costs, whoever makes it.

What we are not claiming

We would rather draw these lines ourselves than have you find them.

We are not claiming a film will put you in Google’s video block, or above a Reddit thread. Google decides what appears there. We did not test it.

We are not claiming a film brings calls. We do not promise more calls or enquiries. A film can explain one thing clearly; whether that turns into work depends on where it is shown and what happens after somebody calls.

We are not claiming no local company answers these questions. We looked at a few results pages on one day. The Facebook video’s owner may well be local to somebody; we have not established where it is.

Search volumes are estimates, Google’s own Ads figures, rounded and averaged over a year. Results vary by location, device and personal search history.

How we measured this

Search volumes come from Google Ads keyword data, requested through DataForSEO on 1 October 2026: United States and Canada, English, the 12-month average from September 2025 to August 2026. Where Google reports no figure, we say “no estimate reported”; that is unknown, not zero.

Results pages are first-page desktop pulls through DataForSEO on 1 October 2026: “how does a grease trap work” in the United States, once; and “how often should a grease trap be pumped” in the United States and Canada, each pulled twice that day, with the same first result every time. Every page carried a video block and an AI Overview. Imperial Brady’s description is taken from its own website, and Waster’s from its own website, both read the same day.

Two caveats we would rather state than have you find. The pumping question we pulled is the low-volume phrasing; we did not pull the results page for “how often should a grease trap be cleaned”, so what we say about the Reddit thread applies to the “pumped” page only. And this is search measurement, not client results; we have no client results in this trade to report, and we say so on the evidence page. Raw responses are retained.

Published by Groundline Marketing, 1 October 2026.