A slow drain, a drain that has stopped, and water coming back up are three different reports. A plumber can quote more usefully when you say which one it is, which fixture is involved, and whether the rest of the property is still draining. You do not need to name the cause. A licensed plumber traces the blockage.
What to write down before you ask
Note the room and the fixture: a kitchen sink, a bathroom basin, a shower, a bath, a laundry tub, a toilet, a floor waste, or an outside gully. Say whether the water drains slowly, stops, or returns after you have stopped using the tap. If more than one fixture is affected, list them. A single basin can be a local blockage. Several fixtures on the same level, or a toilet that gurgles when the laundry empties, usually means the plumber needs to look further along the line.
Say when it started, and whether it followed heavy rain, a blocked gutter, or recent building work. Fats, oils and wipes are common contributors in a kitchen or bathroom line. You can mention them if you know they have been going down that fixture. You do not have to guess. If you have already poured a chemical cleaner into the drain, say so before anyone opens the line. Those products can injure the next person and can damage fixtures.
Inside the building or outside
Water that pools only in one indoor fixture is a different visit from an overflow at a gully or an inspection opening in the yard. Say whether you can see water outside, and whether it appears only when someone uses an indoor fixture. Do not open an inspection point yourself. Sewer gas and contamination are the reason. Do not put a hose, a rod or your hands into a sewer opening to “see how far it goes”.
In a unit or a townhouse, a blocked stack can affect the property above or below. Tell the owner or the managing agent as well as the plumber, and say which level you are on. If you manage the property, put the access arrangements in the job details. The plumber still needs to know whether the tenant must be home.
When it is urgent
If sewage is coming up inside the building, keep people and pets away from the water and stop using the affected fixtures. That is urgent. It is still not a job for this website to dispatch, and the form does not promise a response time. If there is immediate danger, call Triple Zero (000). For a drain that is slow but not overflowing, an ordinary quote is usually enough. Say so plainly, so the plumber does not treat a waiting job as a make-safe call, or the other way around.
What to ask the quote to cover
Ask the plumber to say whether the price is to clear a reachable blockage, or whether a camera inspection or opening the ground would be a separate decision if the first attempt does not clear it. Ask who makes the surface good if paving, a garden or an indoor floor has to be opened, and whether that is included or quoted only if it becomes necessary. Ask which licence class covers the work. Sanitary plumbing and drainage are not always the same class, and the class is set by the state or territory where the property is.
Check that licence on the public register for that state or territory before you accept. The registers are listed on the sources page. A trading name on a van is not the licence. Look up the contracting entity named on the quote.
PlumberQuotes introduces you to a local plumber. It does not clear drains, choose the method, or publish a price for this work. The plumber quotes the property.
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PlumberQuotes introduces you to a local plumber. It is not a plumbing contractor, and it does not promise a time.