As the original poster,
I'm pleased to find so many helpful tips/suggestions, as well as learning about something completely different which is how to un-do the floor drain in a room no longer used as washroom.
Since I grew up in EU I can tell you a couple of things, in the old days long before there were standardized plumbing and health/safety codes, many drains lacked a P-trap, an obvious problem.
Here in the west coast, the code calls for a 1, to 1 1/2 pipe + P-trap before joining the 2" line which kitchen sink, disposal, and DW drain to. If the distance between the junction exceeds so many feet (I'll need to double check the #) then additional vent stack is necessary, otherwise the 2" vent on the branch pipe is adequate.
As for evaporation of fluid inside the P-trap, this model is built on assumption that the kitchen floor is washed down daily and rinsed with appropriate sanitizer which ensures water-block in P-trap is always present and sanitizer mop solution prevents growth of mold inside the pipe.
In colder climates the water in P-trap can freeze, in which case the pipe must be wrapped with adequate insulation blanket equipped with electric heater. Folks who live in the Midwest are familiar with this.
The suggestion of using Anti-freeze is an excellent thought, especially in both cold & warmer climates when building is left un-occupied for up to a month at a time.
Anyway, as for my own project I plan to use vapor barrier membrane and Ditra mat.
Here's my primary challenge I haven't worked out yet,
the transition from kitchen to adjacent family room on one side & dining room on the other hallway.
I hate having a 1 or 2" bump up difference in floor height, and prefer smooth transition across the house.
Its OK to have a gentle slope transition to the next room, but no bump!
Placing the floor drain in middle of kitchen floor is practical in some ways, but presents 2 problems.
A) ergonomically many people don't like stepping on it with bare feet.
B) requires membrane across the entire floor which is fine in a smaller galley, but in a 12 x 12 kitchen, sloping the entire floor to center is a tall order.
So I'm leaning towards placing the drain underneath the sink, dishwasher, & refrigerator/freezer ice-maker where I can do a fare job of sealing this smaller area and pitch the floor slightly in favor of this "pan" if you will, so mob water can wash down under the cabinets.
The obvious challenge here is the finishing of the cabinetry, as a conventional kick board won't do.
Anyway, should y'all come up with a clever idea or see any problems with my plan that I have not realized, please let me know as I appreciate input from this fabulous forum!
Thanks again.
Cheers!
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Posted by: stratmister@gmail.com
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