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If a drain gets clogged again, the cost is a burden, but it is even more frustrating to have to unclog it again without knowing why the problem keeps recurring. King of Drains Website) https://bit.ly/49a8ZY1 King of Drains Consultation Inquiry) 1566-1038 At this site, we didn't just stop at draining the water; we used an endoscope to inspect the inside of the pipe and located a section approximately 8 meters long where grease residue remained and water was pooling. This is a site at a villa in Yeonhui-dong, Seodaemun-gu, Seoul. The client had unclogged the drain two to three years ago, but was experiencing the symptom of water rising into the downstairs bathroom whenever the upstairs residents used water. Once the work began, the clogged water drained relatively quickly. However, upon re-examining with an endoscope, we found a long stretch of hardened grease residue remaining on the pipe walls. In a drain, water can flow down for the time being even if only a small channel forms. However, if grease or foreign matter remains inside the pipe, it can accumulate over time, causing the same symptoms to recur. At this site, we did not stop the work immediately just because the water had drained. After removing grease from the pipe walls using drain cleaning equipment, we re-examined the area using a pipe endoscope. If any remaining debris was visible, we repeated the work on the same section until it was completely clean. We also used a detector to check the direction of the pipes and the locations where water was pooling. If water rises to the floor below when the upstairs unit uses water, do not assume it is a problem with the shared plumbing based solely on the symptoms; you must first verify the location of the blockage and the pipe structure. If the drain clogs repeatedly, do not simply check if the water is draining. It is important to determine where and why the blockage occurred, check for any foreign matter remaining inside the pipe after the work, and verify that the drainage is effective when sufficient water is flowed through it. Frequently Asked Questions Q. Is it unusual for a drain to clog again after only 2 to 3 years? A. It can clog again depending on usage habits and the pipe structure. However, if it recurs, it is advisable to check if the cause remains inside the pipe. Q. Is the work finished once the water drains well? A. Even if only a small water channel forms, water may flow down for the time being. After the work is completed, you must use an endoscope to re-check for any remaining oil or foreign matter on the pipe walls. Q. If water rises to the floor below when the upstairs unit uses water, is it a problem with the shared plumbing? A. In many cases, that is the case. However, it is difficult to make a definitive conclusion based solely on the symptoms. A proper assessment requires checking both the location of the blockage and the pipe junction structure. A. 00:00 Unclogged 2~3 years ago, but clogged again 00:36 Checking the inside of the pipe with an endoscope 01:00 Oil residue discovered for the first time 01:49 The reason work continued even though the water had drained 03:35 Remaining oil found upon re-checking 04:26 Residue blocking most of the pipe 04:53 Repeated cleaning of an approximately 8m section 05:31 Confirming the pipe location with a detector 06:39 The problematic section where water was pooling 07:05 Final check of the inside of the pipe after the work King of Sewers Website) https://bit.ly/49a8ZY1 Inquiries for Seoul, Gyeonggi, and Incheon Service) 1566-1038 View Customer Reviews) https://share.google/9XuDNWqsiO9eorJvf #CloggedSewer #BathroomBackflow #Reclogging #PipeEndoscopy #SewerCause #SeodaemunDistrictSewer #KingOfTheSewer