Hi, like to seek some advice.
This is the drainage pipe my contractor did for me. He said that it cannot extend one end higher over the other and need to follow Hdb tile level. So I'm stuck with this. But my question is: Is what he said true? And if yes won't this clog over the long run? I won't name the contractor for the time being as it's not a shame and blame circus I'm interested in. I just like to seek advice from the folks here and try to solve my problem. Thanks