View Full Version : Plumbing for a remodel/new
02-12-2007, 01:26 PM
We are in the process of remodeling a house and have completely gutted it. We are needing to replumb 2 new bathrooms and the kitchen for a pier and sill foundation. What size pipe do we use for the main sewer line and where can I find diagrams for tying it all together? The bathrooms are on opposing sides of the hallway at the forn of the home and the kitchen and the utility area are at the back where the line into the septic meets the house. Your help would be appreciated.
02-12-2007, 02:06 PM
To do an underground as you are talking about would be a job for an experienced DIYer (lots of plumbing experience) or a pro...
While you could probably do it yourself, a pro could probably have it roughed in, tested, inspected and backfilled in 2 days...
It is not a lot of piping, but the grade and locating the pipes is critical...
This is a job I would sub out...
02-12-2007, 11:10 PM
Usually it's 4" pipe. For most applications it's okay to use whatever is coming from the house. If it is to be inspected then the permit or inspectors office should have copies of requirements with some sample drawings. Pretty much a straight forward job. Need a cleanout within 3' of the outside wall and a 2% slope (1/4" per ft.)... depending on whether sewer or septic tank you may have code requiring a specific type of PVC, ductile iron, or cast iron. Local codes will prevail and dictate type of pipe. If there are no codes use PVC, minimum 3" and no smaller than the pipe from your house/toilets. I don't have a clue what a pier & sill foundation is... any pipe going thru a wall has to be shielded (run it thru a pipe that is larger to allow for movement of the pipe and to keep from damaging the pipe.
For any given installation, four plumbers would have four different piping layouts. Some would be simple and others might be very complex, but all would be designed for that specific installation. From here, without seeing all the variables of space and construction, we cannot give you a piping arrangement that would work. Designing piping for a specific building, not a generic design that doesn't fit any real building, is one reason plumbers spend five years learning the trade. Most DIY'ers do not want to hear "hire an expert", and cannot believe they cannot do it themselves and save a bundle of money, but when you start plumbing an entire house, that is usually the cheapest route in the long run.