I am dealing with a wet basement and looks like I will need to install
a remedial interior perimeter french drain system leading to a sump.
I know that I can use sock covered perforated pipe and gravel but I
have heard that some of the local big waterproof contractors are using
this labor saving modular no gravel system (or something like it)
http://www.j-drain.com/pbasement.htm but I wonder it it is as good .