Please comment on anything wrong with this idea. We have new tile floor and I need to install a new vanity. I am conservative, cheap, innovative, practical. Diamond bit hole saws are expensive and i dont want three holes in the new floor. I am planning to run the hot and cold supply lines INSIDE the 2 inch CPVC drain line. sealing the elbows of the supply, top and bottom with epoxy capable of sealing gravity drain water. Now I can have one hole in the floor and accomplish all three needs. Yes, once in place it will need to be cut top or bottom to replace. No, I won't have a full two inch drain due to the area lost by the two supply lines, but I think it will still drain a vanity. Yes, using CPVC. Please tell me why this is a bad idea! Thanks! AWOL

Our house was built in 1910 and we've owned it 5 years. We have had issues with a stinky house from a drain in the basement, always worse in the winter. It is easily covered up by completely blocking that drain, but as we have a drain line going to it, that doesn't work well. Through more desperate research recently I realized I think this is actually a "cleanout," which I read should not have open access to my basement. Right now there was a crappy rusted grate over it, but otherwise it's a cracked out, uneven hole in the floor that drains away at an angle. I need to plug that smell in, but also allow the drain line to drain into it. This is one option I looked at: [url=http://www.trapguard.com/?page_id=32]Retrofit Existing Drains « Trap Guard – The Trap Primer Alternative[/url] Hole in floor closeup [url=http://s965.photobucket.com/user/jsklein08/media/basement%20stench/2014-10-04080900.jpg.html]Straight On View Of Drain - It Goes At A Drastic Angle Photo by jsklein08 | Photobucket[/url] Hole in floor broad view [url=http://s965.photobucket.com/user/jsklein08/media/basement%20stench/2014-10-04080605.jpg.html]"cleanout" ? Photo by jsklein08 | Photobucket[/url] A/C drain line [url=http://s965.photobucket.com/user/jsklein08/media/basement%20stench/2014-10-04080624.jpg.html]Ac Unit Line - Want To Replace With PVC Photo by jsklein08 | Photobucket[/url] We also want to switch our A/C unit drip line to PVC pipe as we have issues with it draining correctly as it travels across the basement (6 ft?), and I had to rig a system so the flex line doesn't have low points that end up clogging. I want the drain line to have a trap, to keep any possible smell from getting back up the line ([url]http://www.doityourself.com/forum/plumbing-piping/352658-sewer-gas-smelling-coming-drain-basement.html#b[/url]) But I am concerned how that trap keeps from clogging - the water doesn't seem to come out with enough water or force to push through low spots in a flex line, how will it not clog that trap? Also, I am fairly novice and would like more specific instructions/list of pieces I need to complete this correctly. Please help!!