More than one fixture, and the lowest one goes first. That is most of the diagnosis in a single sentence, and it decides everything that happens after it.
Every fixture in the house drains into one pipe, and that pipe leaves under the front lawn. If that one pipe is restricted, the water has to go somewhere, and it goes to the lowest opening inside the building — a shower pan, a tub, or a floor drain in a laundry. It almost never comes up out of the highest fixture, which is why people so often blame the wrong room.
So: run a bathroom sink or a washing machine, and go and watch something else. A toilet that gurgles when the washer drains, or water rising in a shower when a basin empties, is one pipe struggling to take the whole house. That is a main line. If the shower is slow and absolutely nothing else in the house cares, that is a branch line and it is a much smaller job.
If it is the main, every gallon that goes down is coming back up somewhere you can see. No laundry, no dishwasher, no showers, and be careful with toilets. There is nothing you can do with a plunger at that point that will help, and a caustic drain opener poured into a blocked main simply sits in the pipe waiting for whoever opens it — which will be a person with their arm in it.
A cleanout is a capped pipe, usually four inches, that exists so a cable can get into the line without taking anything apart. A house with a two-way cleanout at the foundation is a straightforward call. A house without one means going in through a pulled toilet — which is extra labour, a new wax seal, and a bathroom out of use while it happens — or down a roof vent, which is slower, more awkward, and works against the fall of the pipe the whole way.
We will tell you which one we are looking at before we start and what it changes, rather than after. It is the commonest reason one drain bill is twice another, and there is no excuse for a customer finding that out at the end.
Parts of this area are on septic. When a tank is full or its drainfield has stopped taking water, the symptoms at the house are identical to a blocked line — slow everything, water at the lowest fixture — and a cable put down that line finds nothing wrong, because there is nothing wrong with it. We look at the outlet side before we sell anybody a cabling, because cabling a healthy line into a full tank is charging for a service that could not possibly have worked.
A first backup is usually just a backup. A second one in the same year is information: something in that line is catching, and it is catching in the same place each time. A cable will open it again and it will close again, and the interval is the only thing that changes. That is the point at which a camera stops being an upsell and starts being the only honest thing to offer you — and the point at which a quarterly cabling plan stops being a service and starts being a subscription to the same afternoon.
We will not put a jet down an old line nobody has looked inside. We will not quote a line replacement from the cleanout cap. We will not sell a recurring cabling on a line we have not seen. And we will not describe a line as “cleared” when what we mean is that it will do this again before Christmas.
Ask for a visit and the office will call you back to agree a time. Nothing is priced before somebody has seen it, and you keep whatever we write down.
Scripted demonstration. It cannot book, hold or confirm a time, and it will not quote a price.