At the top of the entrance door is the bathroom washbasin sewer pipe, is there something wrong with

If the old washbasin drain has not been aged and the model is the same as the new washbasin drain, it can continue to be used.

It should be the quality of the product, because the PVC elbow you said is formed by injection molding, when the injection molding process is unreasonable (pressure, temperature), the mold glue design is unreasonable (position, size), the raw material formula is unreasonable (too much calcium carbonate, too little plasticizer) and so on, there are handover marks in some parts of the elbow, and this part is the most vulnerable place of the product. The same batch of products in the same place. PVC is more acidic, and general detergents are more alkaline. >>>More

You can install a basin leak, my home was also a washbasin drain some time ago, and the Shangshanjie basin leak installed later, the effect is very good, you can try.

There will usually be a reserved sewer drain that can be used as a washbasin drain if there is no other purpose. If you want to make other reserved drains, you need to reconsider a tee, keep this mouth and turn the elbow into a tee pipe, you can find a suitable place to place the washbasin (wash basin) at will.

If the washbasin drain pipe is cracked and leaking, it is recommended to use Jinshida multi-functional soft glue to seal and waterproof and repair leaks, and the adhesive surface can be treated cleanly, and then glued on, and the glue can be reused when the glue is completely cured. Multi-functional soft rubber is sold on Jingdong and Taobao, you can learn about it. Hope it helps.