PVC Overflow pipe

[oupulino]

Hi I need honest answer on this question please.
WHO IS RUNING THIS TYPE DIY OVERFLOW ???????????????
Have you ever loose siphon on this overflow pipe.I'm trying to get sump running and looking for this type overflow.
http://www.google.ca/imgres?q=diy+p...66&start=46&ndsp=13&ved=1t:429,r:8,s:46,i:248