A restaurant floor drain that drains slowly every Friday night is rarely the result of one bad clog. In most kitchens it is the visible end of a steady process: grease scraped off plates, washed off equipment and swept up with floor water keeps entering the pipes and settles wherever the run turns or slows. Before you book a drainage contractor or buy a restaurant kitchen grease cleaning machine, it is worth writing down the questions you need answered about the drainage system itself, about how grease gets into it, and about what any machine you buy is actually rated to do.
Start by mapping the drainage system you actually have
Two kitchens with the same symptoms can have completely different causes, so the first round of questions belongs to your own building records, the previous operator, or whoever last serviced the lines.
Where are the floor drains, and what covers them?
Ask for a simple drawing of every drain, channel drain and trap in the kitchen and dishwash area, and check it on site. Note which drains sit under cooking lines, which sit near the dish return, and whether each one has a basket, a strainer pot or a loose grating. A drain without a basket lets food solids pass straight into the line, and food solids are what grease sticks to. If a channel drain has a shallow trap that fills with congealed fat, no amount of floor washing will keep it running freely.
Which grease trap or interceptor is in use, and who services it?
Find out whether the kitchen is protected by an under-sink interceptor, a larger outside interceptor, or neither, and how each dishwasher, prep sink and floor drain connects to it. Then ask who pumps it, how the service interval is set, and what paperwork you receive afterwards. Many local water or sewer authorities set their own requirements for grease control and keep their own records, so ask them directly what applies to your premises rather than relying on what the previous tenant did. An interceptor that is oversized, undersized or left too long between pumps changes the whole picture of what is reaching the pipes.
How accessible are the cleanouts and inspection points?
Ask whether the waste lines have accessible cleanouts, whether any section runs under a slab or through a wall you cannot open, and whether a camera can be fed through from the kitchen to the sewer connection. These details decide what a contractor can do without cutting into the floor, and they also decide how long your kitchen is out of service. If a line can only be reached by removing equipment, plan that work around your trading hours before anyone turns up.
Ask what is actually putting grease into the pipes
A cleared pipe refills at the rate your habits allow. These are the questions to put to your own team, because they are the ones that decide how quickly the problem returns.
Is grease scraped and binning before anything reaches a sink or drain?
Ask how plates, trays, pots and grill scrapings are handled before they go near water. Trays that are rinsed full of sauce and frying oil carry most of their grease straight into the line. A written scrape-and-bin step, applied at the dish return as well as at the pot wash, does more for a slow drain than any machine does. The same question applies to used frying oil: ask where it is poured, and make sure it is never tipped down a kitchen drain.
Are sinks and drains rinsed with hot water?
Grease moves more easily in warm water and sets as it cools, which is why a hot rinse at the end of a task behaves differently from a long cold rinse. Ask whether hot water is available at every sink the kitchen uses for greasy work, and whether the end-of-day routine finishes drains and traps with a hot flush instead of cold water. It is a small change, and it is one of the few that costs nothing.
How is the floor cleaned, and how much of that wash water goes down the drain?
Floor washing around cooking lines carries loosened oil into the drains every time the kitchen is hosed down. Ask whether solids are swept and bins emptied before wet work starts, and whether drain covers, channel traps and the surrounding floor get their own cleaning step rather than just a wash-over. For that step, commercial kitchen floor steam cleaning with hot steam or hot water lifts the film of grease off grating edges, channel covers and the tile around a drain, so less of it is swept or washed into the trap afterwards. It treats the floor, not the pipe, and that is exactly where its value lies.
What to ask a drainage contractor before booking work
When the line itself needs attention, put these questions in writing and compare the answers you get.
- Which method suits my pipe material, pipe diameter and the point where the blockage forms — high-pressure water jetting, mechanical rodding, or removal and cleaning of a trap or channel section? Ask for the reason, not just the price.
- Can you show me the line before and after? A camera record of the same section on both visits is the only practical way to tell a cleared line from a temporarily narrowed one.
- What service interval do you recommend for my interceptor and my lines, and what would you change if the kitchen added a fryer or a second dish line?
- What documentation will I receive — pump-out dates, waste transfer records, inspection notes — and can it be produced quickly for an environmental health or water-authority visit?
- What will you do to keep the kitchen usable, and how long will access panels, wet floors and odours take to settle?
What to ask an equipment supplier before you buy a machine
A steam or hot-water machine is a surface-cleaning tool. It helps you break grease loose on grates, hoods, frames and floors so that less of it reaches the drains, and it does not replace jetting a blocked waste line. Ask the supplier to be clear about which of the two jobs they are quoting you for.
- Which surfaces in my kitchen is this machine intended for, and which ones should it stay away from? Ask for the list in writing, including sensitive items such as electrical panels, bearings, gas connections and sealed floor finishes.
- What are the working parameters, and what do they mean for my routine? On the fixed PowerDe HW02 steam cleaner listed by PowerDe, the detail page gives 6 kW heating power, a 160° steam temperature, 0.8 MPa vapour pressure, an 80 L stainless tank and a 220 V supply, with selectable dry or wet steam. Those figures tell you about steam delivery on surfaces; they say nothing about clearing a pipe.
- How long will it run before the tank needs refilling, and where will it sit in my kitchen? An 80 L tank sets the working cycle, so ask how the machine is refilled, where the water connection is, and whether the unit can be moved to the drains you actually clean. Note also that the HW02 product page is written around vehicle cleaning at forecourts and parking areas, so ask the manufacturer to confirm kitchen use before you treat it as kitchen equipment.
- What nozzles, brushes or lance fittings come with it, and which ones are needed for drain gratings and channel covers rather than for open floor?
- What training, protective equipment and floor precautions do my staff need, given hot water, steam and a wet floor in a working kitchen?
- What happens if a part fails mid-service — what is covered, how fast does a spare arrive, and can the machine be used while it is being repaired?
A short order of work
Take the answers in this order: map the drains, trap and interceptor; fix the habits that send grease into the system; put the floor and drain surrounds into a proper hot-cleaning routine; then have the lines inspected and a service interval agreed. If you want to discuss what cleaning equipment is appropriate for a kitchen like yours, including whether a fixed or mobile steam cleaning machine fits your floor layout, you can send your kitchen layout and cleaning routine to PowerDe and ask for an assessment against your actual conditions.
