Toilet drain line through floor joists?
kirkhall
12 years ago
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davidro1
12 years agodavidro1
12 years agoRelated Discussions
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Comments (4)Check with the inspection agency first to determine whether or not they allow air admittance valves. Some plumbing codes and jurisdictions prohibit their use. Another option if an AAV cannot be used is to vent the sink by way of a 'combination waste and vent'. A combination waste and vent requires a minimum 2" drain for the sink that must terminate into a 3" drain. This 'oversized' drain acts as a drain and a vent. One cannot install a waste grinder on a sink where there is a combination waste and vent, however. Another option is use a standard size drain but vent through the wall if you have the clearance to the doors and windows and can get the vent above the flood level rim of the sink....See MoreToilet drain line through floor joists? (x-post)
Comments (10)There is not a current toilet in the space. Here is my proposed layout: From GWfloorplans The dotted line running E-W between the Master and the hall bath is a beam supporting the floors--used to be an exterior wall downstairs. The only place for a down drain is along the exterior wall (W wall) of the proposed hall bath--at the end near the drawn hall bath toilet (not at the end near the Master bath Toilet. The joists run N-S in this area. The circled S is the location of the current stack for the house/downstairs bath. In this plan, I think the hall bath vanities can be drained to either the toilet lines and W, or to the old stack. The Master bath sinks and shower would require a much smaller down line (what are those called, anyway?), and could more easily be dropped down the W wall again. (under all this space is an open great room)....See Moremove toilet across joists.
Comments (6)What size joists do you have? A waste line from a toilet can be 3" minimum, and you are not allowed to take more than 1/3 of the joist dimension. You also must maintain a 2" clearance from the edges of the top and bottom of the joist membranes. So if you have 2x10 joists, can reduce to 3" waste line, and start 2" from the top, you can travel 28 feet sideways before you get to within 2" of the bottom of your joists. HOWEVER. You can't go nearly that far by plumbing code and maintain wet vent access. Only about 12 feet or so horizontally with a 3" line, depending on local code. If you don't understand wet vents then you will definitely need to have your plumbing evaluated by a plumber before you can make a decision....See MoreCurbless shower drain interferes with joist
Comments (2)As John said moving the joist is possible. There are industry standards to accomplish the task. Without knowing your joist unsupported span, we can't give specific advice. Or ditch the Wedi shower pan and make your own 'mud' pan with the drain wherever you want it. The folks on the John Bridge Tile Forum can walk you through the process....See Morebrickeyee
12 years agokirkhall
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12 years agokirkhall
12 years ago
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