Tonight, or tomorrow morning?
Clear it tonight when multiple fixtures back up together, when sewage appears anywhere in living space, or when the only toilet in the house is unusable. Those are the calls worth an after-hours premium.
It can wait when one sink or tub drains slowly and nothing else is affected. Close that fixture off, use another, and book a daytime appointment. The same work at regular rates usually saves $150 to $350.
Cabling, jetting and camera: what you are paying for
Cabling, also called augering or snaking, drives a rotating cable through the line and punches or cuts through the obstruction. It restores flow quickly and is the right first move on most emergency calls. On a root-fouled clay lateral it opens a channel through the mass rather than removing it, which is why the same line often backs up again within a year or two.
Hydro jetting uses high-pressure water to scour the pipe wall, and it is the tool for grease-caked kitchen lines and for actually clearing root material. It costs more and should not be used on a line that is already compromised, which is why a camera inspection belongs before jetting on any older pipe.
A camera tells you what and where. Insist on footage and a measured distance from the cleanout. That recording is what any second opinion, insurer, or lateral assistance program will ask to see.
What clogs lines in St. Louis specifically
In pre-war housing stock across the city and inner-ring suburbs, root intrusion into jointed clay laterals is the dominant cause. The mature street trees that make those neighborhoods pleasant are the same trees whose roots find the moisture at a loose clay joint.
In kitchens everywhere, congealed grease is the other constant, and cast-iron branch lines in older homes hold it particularly well because the pipe wall is rough. In newer St. Charles County construction, wipes marketed as flushable, plus debris left behind at build time, account for a large share of the calls.
Homes with a known root problem often do better on a schedule than on emergencies: clearing every 12 to 24 months at daytime rates is markedly cheaper than a midnight visit plus a wet basement.
What to try yourself, and what to stop trying
A plunger used properly, with the overflow blocked and enough water to seal, clears a large share of single-fixture clogs. A cheap barbed plastic drain stick pulls hair from a bathroom lavatory or tub in about a minute. A quarter-inch hand auger reaches most sink traps and short branch runs.
Skip caustic drain openers. They do nothing to a root mass, they leave a pipe full of caustic liquid the plumber then has to work in, and repeated use is hard on older cast iron. Do not run a rented drum machine into a main line unless you know how to use one; a cable can wrap a hand or punch through a compromised clay wall.