A clogged drain doesn’t wait for a convenient moment. It shows up on a Tuesday morning when you’re trying to get ready for work, or on a Sunday evening when the kitchen sink fills up and won’t budge. The good news is that many clogs can be cleared at home with tools and supplies you probably already have on hand.
This guide walks you through the step-by-step fixes that actually work, for sinks, showers, and tubs, so you can handle the easy ones yourself and know when it’s time to call in help. We put it together because at Bizzy B Plumbing, we’d rather you have honest information upfront than pay for a service call you didn’t need. If it doesn’t work out. No problem. Call us today (865)233-2900. We’ll get you fixed up.
That said, some clogs go deeper than a plunger can reach. If you work through these steps and the water still won’t drain, we’re a same-day call away in Knoxville, Maryville, Alcoa, Farragut, and the surrounding East Tennessee communities, and we’ll give you an upfront estimate before any work begins.
What to check before you start
Before you grab the plunger, spend two minutes on a quick assessment. Knowing what you’re actually dealing with saves you from trying the wrong fix first and makes the whole process faster. A clogged drain that backs up in one spot usually has a different cause than slow drainage throughout the house, and the solution for each is different.
Figure out which drain is affected
Start by checking every drain in the house, not just the one that’s giving you trouble. Run water in the bathroom sink, the tub, and the kitchen sink. If only one drain is slow or backed up, the clog is local, somewhere between that drain and the main line, and you can likely clear it yourself with the steps in this guide.
If more than one drain backs up at the same time, especially a toilet that bubbles when you run the sink, you have a deeper problem in the main sewer line. That’s a job for a plumber.
Check which type of fixture is affected, too, since a sink, a shower, and a tub each collect different debris and have slightly different fixes.
Check the type of clog you’re dealing with
Sink clogs are almost always built from grease, soap scum, and food bits. Hair and soap residue are the main culprits in shower and tub drains. Knowing what’s likely causing the blockage helps you pick the right tool before you start digging in.
Here’s a quick way to read what you’re facing:
| What you see | What it likely means |
|---|---|
| Water drains very slowly | Partial clog, often near the drain opening |
| Water stands completely still | Full blockage, likely in the trap or further down |
| Water drains slow in multiple fixtures | Main line issue, call us. We have the right tools for that |
| Gurgling sounds when water drains | Air trapped by a partial blockage deeper in the pipe |
Take thirty seconds to pull the drain cover if it lifts off easily, then shine a flashlight inside. You might spot a clump of hair sitting right at the top, which is the simplest fix in this whole guide.
Step 1. Start with the simplest safe fixes
Before you reach for chemicals or tools, try the two fixes that cost almost nothing and work more often than you’d expect. These are the safest starting points for any clogged drain because they don’t risk damaging your pipes, and they take less than five minutes combined.
Try hot water first
Very hot tap water can soften and loosen soap scum and grease that’s partially blocking a drain. Run your hottest tap water directly into the drain for two to three full minutes. If the water starts moving faster, repeat it once more to flush the loosened buildup further down the line.
Skip boiling water if you have PVC drain pipes, which are standard in most homes built after the 1980s. Boiling water can soften PVC joints and cause leaks. Stick with the hottest water your tap produces.
Use a plunger the right way
A cup plunger (the standard flat-bottomed one) works well on sinks and tubs. Fill the sink or tub with two to three inches of water before you start so the plunger seals properly against the drain opening. Cover the overflow hole, usually found near the top of a sink or tub wall, with a wet rag. This keeps the pressure pushing down into the clog instead of escaping through the overflow.
Push down firmly and pull up hard, ten to fifteen times, then check if the water drains. Repeat if it’s moving better but still slow.
Step 2. Remove the gunk you can reach
If hot water and plunging moved things along but didn’t fully clear the clogged drain, the blockage is likely sitting just below the drain opening where you can physically pull it out. This step takes about five minutes and often solves the problem completely without any chemicals or pipe work.
Use a drain claw or zip-it tool
A drain claw (sometimes called a zip-it tool) is a long, flexible plastic strip with small barbs along the sides that grab onto hair and soap buildup. You can find one at any hardware store for a few dollars. Slide it straight down into the drain opening, give it a slow twist, and pull it back up.
Don’t jam it in forcefully. Let the barbs do the work as you rotate and lift slowly.
What comes out is usually unpleasant, but pulling out a matted clump of hair and soap residue often clears the drain immediately. Repeat two or three times until the tool comes back up mostly clean.
Clean the drain cover itself
While you have things pulled apart, take thirty seconds to clean the drain cover or stopper. Soap scum and hair collect on the underside of stoppers in bathroom sinks and can slow drainage on their own. Use an old toothbrush and warm soapy water to scrub the stopper clean before putting it back in place. A clean stopper lets water flow freely and keeps the next clog from forming as fast.
Step 3. Clear the sink trap or use a plumbing snake
If the drain claw didn’t fully solve your clogged drain, the blockage is sitting in the P-trap, the curved pipe section directly under your sink. This is still a DIY fix, but it requires turning off the water supply and having a bucket and gloves ready before you touch anything.
Clear the P-trap
The P-trap is the U-shaped pipe you’ll see under any bathroom or kitchen sink when you open the cabinet. Place a bucket directly under the pipe before you start, then unscrew the two slip nuts by hand (or with pliers if they’re stuck). Pull the trap free and dump whatever’s inside into the bucket.
Rinse the trap thoroughly with water, check the pipe openings for remaining debris, and thread the slip nuts back on snugly. Run water to confirm the drain is clear before closing the cabinet.
Don’t overtighten the slip nuts. Hand-tight plus a quarter turn is enough. Overtightening can crack plastic fittings and cause a slow leak under the sink.
Use a plumbing snake
If clearing the trap didn’t fix it, the blockage is further down the pipe than the trap reaches. A handheld plumbing snake, available at any hardware store, handles this. Feed the cable into the open pipe with the trap still removed, rotate the handle clockwise as you push forward, and keep feeding until you feel resistance. Work the snake back and forth to break up or grab the clog, then pull it out slowly and reattach the trap when finished.
Step 4. Know when it’s time to call Bizzy B Plumbing
Some clogged drain situations go past what a plunger, drain claw, or plumbing snake can reach, and pushing further on your own can make things worse. Recognizing when to stop saves you from turning a fixable problem into a bigger repair.
Signs the clog is beyond DIY
If you’ve worked through every step in this guide and the drain still won’t clear, the blockage is likely sitting deep in the line or there’s a bigger issue at play. Here are the situations where a plumber is the right call:
- Water backs up in more than one fixture at the same time
- You hear gurgling in the toilet when you run the sink or tub
- Slow drains return within a day or two after you clear them
- You smell sewage odors coming up from any drain
- The drain has been slow for weeks or months despite repeated attempts
If sewage odors are present, stop using the affected fixtures and call a plumber the same day. Backed-up sewer gas is not a wait-and-see problem.
What to expect when you call
Calling Bizzy B Plumbing means someone answers who knows East Tennessee homes. We’ll come out, look at the actual problem, and walk you through an upfront estimate before any work starts. You decide what happens next. No pressure, and in most cases, we can get there the same day you call.
A simple plan for next time
Most clogged drain problems trace back to the same habits: grease down the kitchen sink, hair building up in the shower, and small slowdowns ignored until they become full blockages. A five-minute monthly routine keeps drains clear far longer between problems.
Run very hot tap water down every drain for sixty seconds once a month. Clean the shower and tub drain cover every two weeks and pull any visible hair before it builds into a real blockage. In the kitchen, scrape plates into the trash before rinsing, and avoid pouring cooking grease down the sink even in small amounts.
When slow drains keep coming back despite regular upkeep, that usually points to a deeper buildup further down the line. Sewer line camera inspection finds the actual problem before it turns into a larger repair. Call Bizzy B Plumbing and we’ll get you taken care of the same day.