The drains nobody looks at until there is water across the floor. Kitchen and warehouse floor drains, loading dock trenches, garage pits, and parking lot catch basins, cleaned out before the next heavy rain, not during it.
Every business has them and almost nobody thinks about them. The grate in the kitchen floor. The trench across the loading dock. The pit in the garage. The basins around the edge of the parking lot. They sit there working quietly for years, which is exactly why they are never on anyone's list until the day they stop.
And when they stop, they do not fail politely. A blocked floor drain in a commercial kitchen puts standing water where your staff are walking with hot pans. A blocked catch basin turns your lot into a pond at the worst possible moment.
In kitchens it is grease and food solids washed off the floor every night, which settle in the trap and harden. In warehouses and workshops it is dust, packaging debris, and whatever gets swept toward the nearest opening. Both build slowly and then close suddenly.
Long runs with removable grates collect everything a delivery brings in: grit, shrink wrap, cardboard, salt in winter. The grate hides the fact that the channel beneath it is half full.
These are built to collect sediment on purpose, in a sump below the outlet pipe, so that grit does not travel into the sewer. They are supposed to fill, and that is the whole point of them. But once the sump is full the basin stops trapping anything and starts passing debris straight through, or backs up entirely.
Silt, oil, road grit, and in winter an enormous amount of salt. Ramp drains matter more than most because they are the last line before water runs downhill into a structure.
When a big storm hits Staten Island every business with a flooded lot calls at the same time, and everyone is queuing behind everyone else. Basins cleaned out in advance are cheap and boring. The same basins on the morning of a downpour are an emergency call in a line of emergency calls.
For catch basins the sediment in the bottom comes out, not just the loose debris near the top. A basin that still has a foot of packed grit in it has no capacity left to do its job.
Cleaning the basin and leaving a blocked outlet pipe achieves nothing. If the line is restricted we jet it so water actually leaves.
Interior floor drains have traps that hold water to stop sewer gas coming up. Those need clearing out properly rather than being rodded through and left.
Cracked grates, missing covers, broken frames. These are trip hazards and liabilities as much as drainage problems, so we flag anything we see.
A drain that blocks repeatedly usually has a reason beyond debris: a collapsed section, roots in the outlet, or a run that no longer falls the way it should. A camera answers it quickly instead of you paying for the same clean four times a year.
These get inspected, and a floor drain that is backing up or smelling is not treated as a maintenance issue. It is a hygiene finding. The same is true of a drain with a dry trap letting sewer gas into a prep area.
If you are getting smells from a floor drain that is otherwise draining fine, it is often a trap that has dried out because that part of the kitchen is not used much. Easy to fix, easy to prevent, and much better dealt with before somebody with a clipboard mentions it.
For most Staten Island properties, once a year is a sensible baseline, timed ahead of the wetter months. Lots with heavy traffic, nearby trees, or a history of flooding are worth doing twice.
Hosing moves the loose material and washes finer grit further into the outlet pipe, which is where you do not want it. The sump needs emptying, not rinsing.
Yes. Lot work is usually easiest early morning or overnight when vehicles are gone, and interior drains after close.
Sometimes yes, sometimes the basin or its outlet has a real problem. If it repeats after a proper clean we will camera it and tell you what is actually going on rather than book you in again.
That is the sensible way to handle it. See maintenance plans. The whole point is that it happens without you having to remember.
Drain backing up right now?