Mike_in_Cbus
New Member
Hello all!
I have a small master bath I'm gutting and doing a full remodel (50's ranch, with full access to mechanicals in basement). Demo is complete, new subfloor ready for tile. Going Kerdi over a mud bed for the shower (curved curb for radius shower door).
I have moved the toilet from directly above the 4" cast iron stack, to approx. 9' away from stack. Stack is snapped (cleanly! whew!), and ready for dry fit of wyes for shower, sink, vent, and toilet lines. Toilet DWV will enter stack using a 90 deg street directly into into top of new stack (PVC) replacing the iron. Plenty of headroom for pitch. This stack serves this bathroom only, nothing more.
1) My question is: should I run 4" or 3" for the toilet? I have heard everything from "more is better" to "less is better". Some have said the 3" conveys solids more efficiently due to smaller radius, meaning more water per arc of pipe. This makes some sense to me. The 4" pipe is certainly more difficult to work with, but its only the one run. Is there a rule of thumb here? Both apparently meet code.
Have I missed any important information?
thanks for a great forum!
Mike
I have a small master bath I'm gutting and doing a full remodel (50's ranch, with full access to mechanicals in basement). Demo is complete, new subfloor ready for tile. Going Kerdi over a mud bed for the shower (curved curb for radius shower door).
I have moved the toilet from directly above the 4" cast iron stack, to approx. 9' away from stack. Stack is snapped (cleanly! whew!), and ready for dry fit of wyes for shower, sink, vent, and toilet lines. Toilet DWV will enter stack using a 90 deg street directly into into top of new stack (PVC) replacing the iron. Plenty of headroom for pitch. This stack serves this bathroom only, nothing more.
1) My question is: should I run 4" or 3" for the toilet? I have heard everything from "more is better" to "less is better". Some have said the 3" conveys solids more efficiently due to smaller radius, meaning more water per arc of pipe. This makes some sense to me. The 4" pipe is certainly more difficult to work with, but its only the one run. Is there a rule of thumb here? Both apparently meet code.
Have I missed any important information?
thanks for a great forum!
Mike