Storm drain inspection with a push camera means feeding a waterproof, self levelling camera head through a curb inlet, catch basin, or culvert to record pipe condition, blockages, and connection points on video, so problems get diagnosed before flooding or collapse without digging.
How storm drains differ from sanitary sewer lines
Storm drains carry rainwater, not wastewater, but that does not make them easier to inspect. Pipe diameters vary widely, from small residential downspout tie ins to large culverts under roads. Sediment, leaves, and gravel wash in constantly and settle at low points. Standing water is common between rain events, sometimes deep enough to submerge a camera head. Roots intrude through joints just as in sanitary lines, and animals occasionally den inside larger sections. Access points differ too. Instead of a single cleanout, a technician might enter through a curb inlet, a grate, a catch basin, or an open headwall at a culvert outlet. Because storm systems tie into multiple inlets across a street, one blockage can back up water at several points at once, which makes camera work useful for tracing exactly where a clog or crack sits.
Camera and cable specifications that matter for drainage work
Head size still governs which pipes a camera can enter. Compact heads around 17mm to 23mm suit small drain lines and tight downspout connections, while 25mm to 30mm heads handle larger residential and light commercial storm pipe. Many storm lines run well beyond the roughly 1.5 to 6 inch range typical of sanitary branch lines, so a large diameter culvert often calls for a crawler style unit instead of a handheld pushrod camera. Cable length matters more on storm jobs than on short sanitary runs, since a single street segment or long culvert can exceed a hundred feet. Reels built around 100, 165, or 200 feet of pushrod cover most residential and commercial drainage runs, and a built in 512Hz sonde lets a locator team mark the exact position of a defect from the surface once the head stops.
Self levelling heads matter even more in storm work than in sanitary work. Because storm pipe often has debris, standing water, and uneven sediment on the invert, an image that stays upright regardless of camera rotation saves real time reviewing footage. Pushrod flex also deserves attention. Stiffer rod pushes farther through straight runs and standing water, while more flexible rod negotiates tighter bends but can be harder to advance through sediment. Every pushrod camera has a rated minimum bend radius, and forcing it around a sharper turn risks kinking the rod or damaging the cable jacket.
Running a storm drain camera inspection step by step
A methodical approach keeps the footage usable and the equipment safe. The general sequence looks like this:
- Locate the access point, usually a catch basin, curb inlet grate, or culvert end, and clear surface debris before inserting the head.
- Check for standing water depth and flow before advancing, since a fast moving line can sweep a lightweight head off course.
- Feed the pushrod slowly, watching the live monitor for the head to catch the pipe crown rather than dragging along sediment at the bottom.
- Note footage counter readings at every defect, joint offset, or side connection so distances match up with the sonde locate later.
- Record continuously rather than in short clips, since a full pass is easier to review than several disconnected segments.
- Withdraw the camera the same way it entered, checking the cable for kinks, cuts, or debris buildup before the next run.
Two technicians make storm drain work easier than one. One manages the reel and monitor while a second watches for traffic, confined space hazards, or rising water at the access point.
What the footage actually shows
Reading storm drain video is a skill on its own. Sediment build up appears as a rising floor along the invert, thickest just past a bend or a low spot where flow slows down. Root intrusion shows up as fine hairlike growth at a joint, or as a dense mass further down the line where a larger root has fully entered. Cracks and offset joints look different in storm pipe than in sanitary pipe because water levels change constantly, so a defect visible at one flow rate may sit underwater at another. Collapsed or bellied sections show as a sudden dip in the pipe alignment, sometimes holding standing water even during dry weather. Debris such as gravel, leaves, or trash bags typically clusters near inlets rather than mid run, since that is where surface runoff first enters the system. Comparing footage against a camera head reference for the pipe’s actual diameter helps confirm whether a defect is genuine or simply a design feature like a reducer or transition fitting.
Choosing equipment for the scale of the job
A handheld pushrod unit from a brand such as VEVOR, Anysun, or Sanyipace fits most residential storm drain checks, downspout tie ins, and short culvert sections reachable on foot. Larger municipal or commercial culverts, especially runs exceeding what a pushrod can travel unsupported, suit wheeled crawler systems that carry their own lighting and drive motors. Professional grade systems such as RIDGID SeeSnake sit toward the higher end of the pushrod category and are commonly chosen by contractors moving between sanitary and storm work the same day. Whichever category fits the job, matching cable length and head size to the actual pipe diameter, using the pipe size checker as a starting reference, prevents wasted time on a camera that cannot reach the far end of a culvert or that is too large for a small connection pipe.
Frequently asked questions
How do you inspect a storm drain with a push camera?
Insert a waterproof, self levelling camera head at an accessible catch basin, curb inlet, or culvert opening, then feed the pushrod slowly while watching the monitor. Note the footage counter at every defect or side connection, and use a 512Hz sonde afterward to mark the exact surface location of anything significant.
What camera head size works best for storm drains?
Head size depends entirely on the pipe. Compact 17mm to 23mm heads suit small drain and downspout lines, while 25mm to 30mm heads handle larger residential storm pipe. Culverts beyond typical pushrod range generally need a crawler camera instead.
Can a push camera handle standing water in a storm drain?
A properly rated waterproof camera head is built to operate submerged, which is common in storm lines between rain events. Check the flow speed first, since fast moving water can sweep a lightweight head off its path even when the electronics stay protected.
Why do storm drain inspections take longer than sewer line inspections?
Storm systems usually have multiple access points, larger and more variable pipe diameters, and heavier sediment or debris loads than a single sanitary branch line. Reviewing footage also takes longer because defects can look different depending on the water level at the time of the run.