One slow drain
is not a sewer.
A kitchen sink that drains slowly is usually a kitchen problem. A tub that fills when you flush is not.
Start with how many fixtures are involved. One basin, one shower, or one toilet points at that trap, that branch, or the way that fixture is used. Grease in a kitchen line, hair in a shower, a toy or a wad of paper in a toilet: those are local. They are unpleasant, and they are contained.
The main line announces itself in more than one room. You flush, and the tub gurgles. The washing machine drains, and a floor drain in the garage pushes back. A lower bathroom smells when an upper one is used. Water is trying to leave and finding the lowest open bowl instead. That is a sewer or a building drain, not a stopper you can pull.
What makes it worse
Chemical opener poured into a line that is already full does not give the clog a place to go. It sits in the water you will eventually have to open. Plunging one toilet while the tub is rising can move sewage into a second room. If more than one fixture is backing up, stop using water in the house, including the laundry and the dishwasher.
Los Angeles houses add a few ordinary causes. Tree roots at a clay joint. A belly in a yard line that holds paper until it finally closes. A cleanout buried under a deck someone built in 2004. A backwater valve that was never serviced. None of those show up as “the sink is slow” until the day they do.
What we sort out on the call
Tell us which fixtures failed, which floor they are on, and whether anyone has already cabled the line. A cable that cleared it last month, and a backup that returned, is a different visit from a first-time kitchen clog. We want the cleanout if you know where it is. We do not need you to open a pit before we arrive.
The work starts by finding where the flow actually stops. Clearing a soft clog and repairing a broken lateral are both possible. They are not the same recommendation, and you should hear which one it is before anyone talks about replacement.
Smell, gurgle, and the floor drain
A backup is obvious. A line that is only almost closed is easier to misread. A tub that gurgles when the washer drains, a toilet that bubbles, a floor drain in the garage that is damp though nobody has spilled anything: those are the main line asking for attention before it overflows. A sewer smell that shows up in one bathroom and nowhere else can be a dry trap, especially a floor drain or a forgotten shower that has not been used. Pour water in that trap before you assume the yard line is broken. If the smell is in several rooms whenever water is used upstairs, the vent or the building drain is the more likely story.
Your line, and the city’s
The pipe under the house and through the yard is almost always the owner’s problem up to the connection at the city main. A heavy rain that floods the whole block is a different event from a backup that happens on a dry Tuesday while the neighbor’s plumbing is fine. We can usually tell those apart from where the stoppage sits. A cable that goes a few feet and hits roots is your lateral. A line that is clear to the city connection, while water still will not leave, is a conversation with the city, and you should not pay for a replacement you do not need in order to learn that.
On the call, say how many fixtures failed, which one sits lowest, and whether a cleanout is visible in the yard, the driveway, or the garage. If you have had this cleared before, say how long it stayed clear. That number decides whether tonight is a clearing or the start of a camera.
Related service: Drains and sewer lines. For the visit itself, call 818-631-7296 or send the address.