Hello all,
I am currently in the beginning stages of a bathroom remodel (half way through demolition) and would appreciate any input on the layout of my drain lines and vents. I am moving the location of the toilet and sink. The tub is being replaced with a shower with a 2" drain line and the toilet is being moved about 3 feet. The sink is also moving a couple of feet closer to the exterior wall. I am on a concrete slab that is not post tensioned. This area this bathroom is in was originally an attached garage that was converted into a bedroom/bathroom, so the plumbing is not original to the house (house was built 1960, add on was done about 10-15 years ago).
Since I am having to reroute/replace all of the drain lines inside the bathroom, I am going to have to break some concrete. I would prefer not to break any more than is neccesary. If you will note my image below, the green lines are drain lines, and the red ones are vents (this is a single story house). First off, does the routing make sense/pass muster? It will all be sloped 1/4" per foot. There is a 4" drain line outside (top) that the current bathroom pumbing drains into, the new plumbing will tie into this line. Since the sink will be close to the outside wall, my plan is to run its drain straight down throuhg the wall, through the concrete slab, the el to the outside. From there it will then tie into the 4" exterior line. For this drain, I was thinking about boring a 2" hole in the concrete slab to run the 1.5" drain line. Since it is only about 18 inches form the exterior, it would be pretty easy to simply dig from the outside to install the el and remaining pipe.
I would knock out a trench from the shower drain to the toilet flange, using 2" line (with p-trap of course) for the shower, then connect that to the 3" line for the toilet. For the vents for the shower and toilet, I was thinking about again boring a 2" hole for each and run them up and into the attic. Currently, each fixture has a 1.5" vent that is tied together in the attic, then a single 1.5" vent protruding through the roof. I have heard that newer toilets should use a 2" vent, but have also seen on this forum how a single 1.5" vent could be sufficient. If I could tie all the vents together and utilize the existing 1.5" vent, that would be great. If not, I am willing to do what it takes to build it properly. Thanks in advance for everyone's help!
I am currently in the beginning stages of a bathroom remodel (half way through demolition) and would appreciate any input on the layout of my drain lines and vents. I am moving the location of the toilet and sink. The tub is being replaced with a shower with a 2" drain line and the toilet is being moved about 3 feet. The sink is also moving a couple of feet closer to the exterior wall. I am on a concrete slab that is not post tensioned. This area this bathroom is in was originally an attached garage that was converted into a bedroom/bathroom, so the plumbing is not original to the house (house was built 1960, add on was done about 10-15 years ago).
Since I am having to reroute/replace all of the drain lines inside the bathroom, I am going to have to break some concrete. I would prefer not to break any more than is neccesary. If you will note my image below, the green lines are drain lines, and the red ones are vents (this is a single story house). First off, does the routing make sense/pass muster? It will all be sloped 1/4" per foot. There is a 4" drain line outside (top) that the current bathroom pumbing drains into, the new plumbing will tie into this line. Since the sink will be close to the outside wall, my plan is to run its drain straight down throuhg the wall, through the concrete slab, the el to the outside. From there it will then tie into the 4" exterior line. For this drain, I was thinking about boring a 2" hole in the concrete slab to run the 1.5" drain line. Since it is only about 18 inches form the exterior, it would be pretty easy to simply dig from the outside to install the el and remaining pipe.
I would knock out a trench from the shower drain to the toilet flange, using 2" line (with p-trap of course) for the shower, then connect that to the 3" line for the toilet. For the vents for the shower and toilet, I was thinking about again boring a 2" hole for each and run them up and into the attic. Currently, each fixture has a 1.5" vent that is tied together in the attic, then a single 1.5" vent protruding through the roof. I have heard that newer toilets should use a 2" vent, but have also seen on this forum how a single 1.5" vent could be sufficient. If I could tie all the vents together and utilize the existing 1.5" vent, that would be great. If not, I am willing to do what it takes to build it properly. Thanks in advance for everyone's help!
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