your drain from the kitchen goes down from the wall to a horizontal pipe for a long distance before it is connected to the main drain.
This section of pipe (probable a 1 1/2 inch or a 2 inch) does not have sufficient slope to facilate the flow of water. Water flows too slowly, and the grease accumulates.
The clog is caused by hardened grease. You need to run the snake multiple of times, each time retrieve a small portion of the clog until it's all clear.
There is no easy way to eliminate the problem permanently unless you change the slope of the drain. Otherwise you can change the way you do you dishes, avoid putting grease into the drain.
在修理工开始修理之前，我自己尝试过一些化学产品，比如 Drano 和一点小苏打。我现在想再试一次，但修理工当时跟我说，Drano 可能会损坏管道，不建议使用。
这是我在修理工修理之前拍的视频：
https://youtu.be/FUKzJnL_7Tg
现在的情况比当时稍微好一点，但我觉得很可能很快又会堵得很严重。想请问这里有没有人有更好的建议？先谢谢大家了！
那个人说开始也是请职业工，两年后又出现。他用开水冲了几次，然后用 bio-clean。。。
for how long before the problem returned?
show me a photo of the pipes under the sink in the kitchen cabinet. I probably know what the problem is.
看看这里
https://www.wikihow.com/Clean-a-P%E2%80%90Trap-or-U%E2%
The second time after he used 24 feet long auger snake, it took several days to one week.
Here is the photo of pipes underneath the sink. Thank you very much!
没问题吧？左右两边都是通的，只是往外走不通，水才从水池里冒出来
floor. You said this is the only place that had backup.
那师傅自己都说可能还会有问题。英文论坛上有人说用再长一点的。
我准备用开水先试试。不行还得用更长的auger
2寸半的管子堵的只剩1寸不到了
另外，这种换管子是不是就算是plumbing updated?
your drain from the kitchen goes down from the wall to a horizontal pipe for a long distance before it is connected to the main drain.
This section of pipe (probable a 1 1/2 inch or a 2 inch) does not have sufficient slope to facilate the flow of water. Water flows too slowly, and the grease accumulates.
The clog is caused by hardened grease. You need to run the snake multiple of times, each time retrieve a small portion of the clog until it's all clear.
There is no easy way to eliminate the problem permanently unless you change the slope of the drain. Otherwise you can change the way you do you dishes, avoid putting grease into the drain.
kitchen pipe, then run hot water to melt the grease
Jones Stephens Plumbjet Drain Cleaning Bladder