I am installing an upflush toilet system in my basement. It calls for a 3" Vent line. Since I am going from the basement and up two floors to the attic, can I reduce from the 3" Vent line to a 1 1/2" vent line.

I took a picture of water on a rug in a basement under fluorescent lighting, flash and a UV filter. Screen pics are fine, but when the 2.3 MB images were printed as 5 x 7 on photo paper, there were verticle lines about every inch. I guess I need a fluorescent lighting filter? Do you know...

I had a small water stain appear on my roof this winter and went up in the attic to find frozen condensation below the vent where both my water heater and my furnce exit the roof top. Do you have any suggestions on what could be causing this and how to rectify the situation.

what is the right way to install a 6x6 support for a 14' x 20' deck. The water level is only 2' below grade. Do I dig a hole below the water line. Do I put the wood on a concrete slab. The deck is only a couple a feet off the ground. Should I dig it down below the frost line.

Does a vent line have to be installed upline from a toilet, on can it be downstream?