try unscrew the nut and see if the gasket ring is missing

if the ring is missing or damaged you have to disemble the p trap to put new one in.

所有跟帖： 

• 謝謝指教，心裏有數了。這麽複雜的工藝還是得找水管工， 自己不敢做。謝謝！ -summerfly- ♀ (0 bytes) () 11/25/2023 postreply 19:21:13

• not really, just unscrew it with hand and put back. you need -borisg- ♂ (3694 bytes) () 11/25/2023 postreply 19:24:29

• 太感謝了，連尺寸都給了，用手擰下來，連工具都不需要，再不試試自己都不好意思了。謝謝！ -summerfly- ♀ (0 bytes) () 11/25/2023 postreply 19:41:01