Slow Drain: What to Check First

The most useful thing to know about a slow drain is whether it is the only one. A single sink or tub that empties sluggishly usually has a clog close to the fixture, often hair, soap or grease, and you can often clear it yourself. When several drains in the house are sluggish at once, the problem sits further down, in a branch line or the main line, and it needs a licensed plumber with drain equipment. If you reach that point, One Call Home Pros connects you with a vetted, insured local professional.

The short answer

Every fixture in the house drains into a shared system of pipes that runs to the main line and out to the sewer or a septic tank. Where the clog sits decides what you notice.

A clog in a sink trap affects that sink only. A clog in the branch under a bathroom affects the sink, the tub and maybe the toilet in that room. A clog in the main line affects every drain, and the lowest fixtures, usually a shower or a ground-floor toilet, show it first.

So count the drains. One means local. Several in one room means the branch. All of them means the main line.

What to check first

These checks are safe for a slow drain at a single fixture.

1. Clean the stopper and strainer. Lift out the bathroom sink’s pop-up stopper or the tub’s strainer and clear the hair and soap wrapped around it. That alone often fixes it.
2. Use a plunger. A cup plunger works on sinks and tubs. Block the overflow hole with a wet cloth so the pressure goes down the drain, not out of the top.
3. Try a plastic hair-removal strip. These thin barbed strips reach a little way into a bathroom drain and pull out hair clogs.
4. Run hot water down a kitchen drain. Grease that has started to set can loosen with plenty of hot tap water. Do not use boiling water on plastic pipe.
5. Check other drains. Run the tub, the other sinks and the washing machine. If they are sluggish too, stop here.

When to stop and call a pro

Avoid chemical drain cleaners. They rarely clear a solid clog, they can damage older pipes and seals, and they leave caustic water sitting in the pipe for whoever opens it next. Do not take apart a trap unless you are confident putting it back watertight, and never open a cleanout on the main line. If the line is full, sewage can flow out of it under pressure.

Call a plumber if:

• More than one fixture is sluggish, or drains gurgle when others are used
• Water backs up into the tub when you flush, or into a floor drain
• You smell sewage near a drain
• The same drain clogs again soon after you cleared it

Why repeat clogs mean something further down

A drain that clogs, clears and clogs again is telling you the first fix did not reach the cause. Plunging or pulling out hair clears the top of the problem. If there is a build-up further along the pipe, the line keeps catching new debris on it.

Common causes of repeat clogs:

• Grease and food waste that have coated a kitchen line over time
• Scale and corrosion inside older cast iron drain pipes, which narrow the pipe and snag debris
• Tree roots that have found a joint or crack in the line outside
• A sag or belly in a buried line where water and waste settle
• A blocked or missing vent, which slows every fixture on that branch

A plumber can clear the line with a cable machine, and can also run a camera inspection to see the cause, or use hydro jetting for heavy build-up. Those are the pro’s call, once they know what they are dealing with.

Florida specifics worth knowing

Many Broward County homes are built on concrete slabs, with the drain lines running under the floor. In older homes, those lines are often cast iron, which corrodes and scales from the inside. A corroded line can feel like a slow drain problem for a long time before it shows any other sign.

Tree roots are another local cause. Large trees planted near a house send roots toward the moisture in sewer lines, and a small crack is enough for them to get in. Some homes in the county are on septic tanks rather than city sewer, and a full or failing septic system makes every drain sluggish.

How One Call fits in

One Call Home Pros is not a drain company and does not do the work. When you call, tell us which drains are affected, what you have tried and whether there are any smells or backups. We match you with a vetted local professional who is licensed for plumbing and drain work and carries insurance. The pro finds the clog, clears it and tells you what caused it. One Call arranges the visit and stays with the job until it is done.

You pay One Call, and One Call pays the pro. Ask what the price includes before work starts. Read more about drain cleaning, or see the pages for drain cleaning in Pompano Beach, Plantation and Pembroke Pines.

Get the drains flowing

If clearing the stopper has not fixed it, or more than one drain is sluggish, tell One Call what you are seeing. We connect you with a vetted, licensed local pro.