Standing water that creeps over your ankles and takes minutes to drain is the classic signal that a shower drain has clogged, and in most homes it is hair wound around soap scum in the first stretch of pipe. A plumber clears that in a single visit. The sister page on the clogged toilet plumber covers the other main fixture in the bathroom.
Read on for the DIY-or-call question, the signs of a deeper blockage, the plumber's method and typical Pasadena prices. To book, fill in the quote page.
Which signs mean a shower clog is beyond DIY?
Book a plumber if water still stands after a hand tool, if another fixture backs up into the shower, if gurgling or a sewer odor rises from the drain, if the problem is back within a few days, or if the cover will not lift. Each sign points beyond the trap, toward the branch line or the drain assembly.
A plain slow drain with visible hair at the top is different: a cheap plastic hair strip or a quick pull of the stopper often fixes it. If you have already done that and the water still pools, you are probably dealing with a deeper buildup, and the next move is a cable or a camera, not more liquid.
Our how-to page on unclogging a shower drain covers the hands-on version, and a tub drain guide deals with bathtubs that have a stopper mechanism.
What causes a shower drain to clog in Pasadena homes?
Hair is the main culprit, but it rarely works alone. Soap scum, body oils and shampoo residue bind it into a mat, and the local water adds to the problem: Pasadena Water and Power describes the city's water as very hard, and hard water makes soap leave a sticky film that catches debris.
Older bathrooms add their own quirks. Homes dating from the early and middle twentieth century can have shower and tub drains running into narrow cast iron or galvanized pipe, which roughens over time and grabs buildup. A drain with a long flat run or a sag collects the same debris faster.
Other causes: a dropped razor cap or toy, plant roots in the underground line, and a blocked vent that slows draining and causes gurgling. Our note on a clogged drain vent explains how to tell vent trouble from a clog.
Why do chemical drain cleaners cause trouble in a shower?
Chemical openers rarely clear a hair clog completely, and they can leave caustic liquid sitting in the trap. That is a hazard for whoever opens the drain next, and strong products can heat and soften plastic fittings or damage older metal. Following one product with another can release dangerous fumes.
Already tried a chemical product without luck? Name it, and say when you poured it, to the plumber. That decides how the trap is handled, and which gloves and eye protection come out.
For a mild first step, hot tap water and a mechanical tool are safer. Skip boiling water if the trap or pipe is plastic, and never mix products.
How does a plumber clear a blocked shower drain?
The plumber removes the drain cover and strainer, pulls out any visible hair, and feeds a hand auger or small cable through the drain and trap to break up and retrieve the clog. If the blockage sits deeper, a larger machine or a camera reaches the branch line. Water flow is tested at the end.
If the clog came from a sag, roots or broken pipe, the plumber will say so and quote the repair separately. A camera inspection reveals the pipe's condition, handy for a drain that never stays clear.
On tub and shower combinations, the trap may be reachable only through the stopper assembly or from an access panel. Access is why some visits take longer than others, and why the written quote says what is included.
What is a typical price for clearing a shower drain?
As a guide, published 2026 price pages put a plumber's shower or tub drain clearing at roughly $100 to $350, with many jobs at $150 to $250. A drain that needs a camera, a stubborn cover, or a deeper branch line costs more. Evening and weekend calls often add a premium.
HomeGuide lists snaking a tub drain at about $100 to $250, and other price pages give similar bands. These are national numbers, so a Pasadena quote may differ. Cleaning several fixtures or the main line runs higher, commonly into the several-hundred-dollar range.
What raises the price: hard-to-remove drain covers, older tub hardware, a clog in the branch line, water backing up into another fixture, and after-hours timing. A written price reaches you before the plumber begins.
What keeps a shower drain clear afterward?
Put a mesh screen over the drain to trap hair, clean out the stopper or strainer every few weeks, and finish showers with a hot rinse. Hair is the main building material of shower clogs, and keeping it out is far cheaper than clearing it.
Because Pasadena's water is hard, soap scum builds faster, so a monthly clean of the strainer and the visible trap is worth the two minutes. An enzyme cleaner used on a schedule can slow film from forming, though it works slowly and will not clear a full blockage.
Persistent scale on fixtures has its own remedy in our hard water scale guide, and a whole-house softener is another route.
Is it a clogged drain or a low-pressure problem?
They are different faults that can look alike. A clog shows up at the drain: standing water, slow draining, gurgles. Low pressure shows up at the showerhead: a weak spray. If the water drains fine but the spray is weak, the issue is supply, a clogged showerhead or a failing valve, not the drain.
Hard water scale clogs showerheads and cartridges the same way it narrows drains. Supply-side checks are on the low shower pressure page, and a tub with no pressure while other taps are fine is its own case.
Common questions
How long does clearing a shower drain take?
A simple hair clog at the trap is often a short visit, usually well under an hour. Awkward traps, a deeper branch line clog or a camera inspection stretch that out. Once the drain has been seen, the plumber can give a closer estimate.
Can I handle a shower clog on my own?
Frequently, when the clog is hair near the top. Lift out the stopper or cover, work a plastic strip or small hand tool down, then flush with hot water. Phone a plumber if water still stands, other fixtures back up, or the cover is stuck.
Why does the shower still smell after I cleaned it?
Odor can come from residue left on the drain wall, from a dried-out trap in a rarely used shower, or from a vent or sewer line fault. Running water for a minute refills the trap. An odor that lingers, especially with gurgling, calls for a plumber.
Could the plumber damage my shower?
A careful plumber removes the cover and works through the drain without marring the shower. Older tubs with brittle stopper hardware or cramped access need extra care, and the plumber should flag that before starting. Mention known cracks or loose tile when you book.
Does clearing a shower drain need a permit?
Cleaning a clogged drain does not normally need a permit, but replacing or moving drain pipes can. Cities in the San Gabriel Valley run their own building offices, so the plumber checks with the one that covers your address if the job goes beyond clearing.
For the wider picture, start with plumber across Pasadena.
Sources
- Cost to unclog or snake a shower or tub drain, ranges across published 2026 guides (HomeGuide, Angi, ConsumerAffairs and plumbing company price pages), checked November 2026
- Pasadena Water and Power, water quality FAQs
- California Contractors State License Board, hiring a contractor
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