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Korean Plumbing, Decoded
Everything here comes from questions real customers text us — usually mid-crisis, occasionally mid-argument with a landlord. Written by the technician who does the actual repairs, not a content farm. Read now, or bookmark for the bad day.
Who pays for plumbing repairs in Korea — landlord or tenant?
The repair-bill question every renter in Korea eventually faces. What the Civil Act actually says, how jeonse and wolse differ in practice, and which documents settle the argument.
How to call a plumber in Korea (when you don't speak Korean)
Copy-paste Korean text templates, what to photograph, how to explain your address, and the questions that keep a visit from turning into an overcharge.
Can you flush toilet paper in Korea?
The wastebasket-next-to-the-toilet mystery, explained. Which buildings can actually handle paper, and the one product you should never flush anywhere in Korea.
Why your Korean bathroom smells like a sewer — how to find the cause, in order
That sewer smell is not "just how Korea is." Korean wet-room bathrooms drain through the floor, and the floor drain is usually where the smell sneaks in. The five-minute checks, and the signs it is a real pipe problem.
Frozen pipes in Korean winters: prevention and what to do
Cold-wave alerts, exposed meter boxes, and boiler lines: how to get through a Korean winter without a burst pipe, and the safe way to thaw one that already froze.
Moving into a Korean apartment: 10-minute plumbing checklist
Ten minutes with your phone camera on move-in day can decide who pays for problems months later. What to test, what to photograph, and who to message about it.
Is this a plumbing emergency? What to do in the first ten minutes, and what to send us
The four situations that cannot wait, the four shut-off valves in every Korean unit, and what to text so the reply is an honest time window rather than a promise. Includes who to call when it is not a plumber at all.
How to unclog a Korean toilet yourself — and the three signs to stop and call
Which of the two Daiso plungers to buy, what the sticker (뽕투) actually does, warm water and soap for paper — and the three signs that mean stop pushing and send a photo.
No hot water? Three different causes, three different people to call
Boiler panel buttons in English (온수·난방·외출), why a lukewarm shower with a hot kitchen is a cartridge, the officetel electric heater checklist, and the Korean line for the boiler service desk.
Water leaking into the apartment below (아랫집 누수): the order of things, and the leak report
Day one in order, how detection rules floors in and out before any tile is opened, what the leak report (누수 소견서) contains, and what the daily-life liability insurer typically asks for.
Weak shower, slow tap (수압 약할때): where Korean apartments lose pressure, in the order to check
The sixty-second test that splits one fixture from the whole unit, the finger-fixes first, the pressure-reducing valve, officetel peak hours, and when a booster pump is allowed.
Air conditioner dripping indoors? Its drain hose is blocked (에어컨 배수관 막힘), not the refrigerant
Wall unit, in-wall drain line or ceiling cassette — why the condensate path clogs in a Seoul summer, the five-minute checks, and where the AC company's job begins.
The Korean shower faucet: how it is put together, what fails, and what to buy before you call anyone
Eccentric adapters, cartridge, diverter and the rain head (해바라기): what fails in what order, the three photos to take before buying online, and the kitchen wall faucet (벽수전) question.
Winter plumbing trouble: who to call first — landlord, management office, waterworks or plumber
Two checks on a freezing morning — is it only you, and what does the meter look like — then the short list of who goes first: building, waterworks, boiler AS, landlord or plumber. With Korean messages to copy.
Frozen or cracked water meter (수도계량기 동파): what to do and who replaces it
How to tell the meter is the problem, how to stop escaping water without snapping a valve, why the waterworks replaces it, and what can still be wrong on your side once the new meter is in.
Washing machine won't drain in winter? The veranda drain or hose has frozen
A drain error mid-cycle or grey water on the veranda: telling a frozen hose from a frozen floor drain or the building's shared pipe, thawing safely, and why buildings ask residents to pause laundry in a cold wave.
If reading is not enough
Guides fix the easy problems. For the rest, there is a certified technician in Sadang-dong, Dongjak-gu, Seoul who works this way:
- Fixed quote before work starts — you agree to the number first. If the scope turns out to be different mid-job, we stop and explain before anything continues.
- Card payment accepted. Cash receipt or corporate tax invoice (세금계산서) issued on request.
- VAT 10% is quoted separately, and we tell you the VAT-included total before starting.
Browse our services, check how pricing works, or see the FAQ for quick answers.
What the problems look like
Photos from our own jobs — the situations these guides describe.
