basement bathroom ideas

[mikejurasw]

Hi everyone, I'm hoping to renovate an old basement bathroom (flange in the floor, filled with concrete some years ago), expanding and moving it a little. Before I rent a jackhammer, can anyone help with a few questions:

1) I'd like to locate the new toilet within 3 or so feet of the soil stack. Can I position the new flange directly over the horizontal branch from that stack to the home's main sewer line? It would be a vertical drop of maybe 2 feet into some combo of 45-degree street elbow and a new T/Y and then out-she-goes!

2) Does the vertical soil stack count as this toilet's vent? (The fixture will be downstream of the stack.)

3) If I want to add a lavatory, and vent it with an air admittance valve (ok in Ohio...), does it matter whether the lav drain enters the main line before or after the toilet?

Thanks!
MM

 

[Snoonyb]

You'll need to vent the WC waste, other than, the existing vent, because of the volume, of the instantaneous introduction initiated by the flush.

 

[Eddie_T]

I have two toilets and two tubs sharing a single vent. The vent is centered between between the toilets. The soil pipe and all connections are under the slab so I can't be sure where the tub drains connect w/respect to the vent but it has to be between the first toilet and the vent. The toilets are about five feet apart and the vent seems to be centered.