Recent content by wwhitney

1) Yes, if the total fall from the tub trap to the crotch of the 2x2x1-1/2 wye is no more that one trap diameter, or 1-1/2". The 2" line carrying only two dry vented lavs can act as a wet vent. The distance from the lav and lav vent to the 2x2x1-1/2 wye is immaterial. 2) Yes, if the above...

Using a double wye with the barrel horizontal is problematic. If you think about a line (the barrel) pitched at 2%, and then add in the two side inlet lines themselves coming off at 2% and 45 degrees to the barrel, that shape is not planar. But a double wye is planar. It is doable if you...

Unfortunately, Fernco QL200 is not an acceptable solution to your issue. Per Fernco's website, the only standard it conforms with is ASTM D5926. That standard is not referenced in the California Plumbing Code Chapter 7 on Sanitary Drainage. Sections 705.10.3 and 705.10.4 of the California...

On the wet venting, the 2" kitchen/laundry drain needs to be kept separate from the bathroom group. So rather than join the shower, run it separately until it can tie in after the WC joins the shower/lav. Also, while the lav trap arm can be 1-1/2", it needs to hit a 2x2x1.5" san-tee for the...

What's your code compliant method for connecting a stainless steel 2" spigot end to a PVC hub? Also, the elbow you have drawn is a vent elbow, that is not allowed for drainage. Cheers, Wayne

Yes, exactly, that's fine as your dry vent is always at least 45 degree above horizontal. The 1-1/2" pipe between the existing san-tee and the new wye is redundant but fine. [I guess if it's easier, you could cut part of it out, cap the lower part, and then use a 45 instead of a wye.] Cheers...

No, the horizontal dry vent section you show at the top part of the square is not permitted, as it is below the fixture flood rim. [BTW, the existing offset in the dry vent should either be done with 45s (which means the offset segment counts as vertical), or be at least 6" above the fixture...

Check your stub out heights, they may both be too high. Cheers, Wayne

Yes and yes. You're redoing some of the 3" anyway, so just demoing back to upstream of the dry vent takeoff gives the cleanest final result. But if removing the vent takeoff for the WC would be particularly difficult, I'm not aware of anything that would prohibit just capping the vent below...

The IPC limits a 2" horizontal branch to 2 DFU. A lav is 1 DFU, a tub is 2 DFU, and a shower is 2 DFU. So exiting the wye where the first shower/lav joins the tub, you have 5 DFU; existing the wye where the second shower/lav joins in, you have 8 DFU. That means you must use 3" starting at...

Yes, that's fine, if I mentally infer from what you've drawn something plausible in 3D. And definitely do use two different wyes on that branch down the middle the of the page. Not exactly sure what you mean. There is the question of whether everything will fit within the vertical space...

Good. So if you have another lav that can act as a wet vent for some of the fixtures, then that gives you options on the connectivity order. What you are not allowed to do is wye together two unvented fixture drains. Each fixture drain either needs a dry vent before it joins another drain, or...

So there's the question of venting these two showers and the tub. The simplest way to do that is use the properly dry vented lav drain to wet vent them. Which would work with your drawing if the drain going to the bottom left is the incoming lav drain. Then what you need to do is combine the...

Seems like the onus is on the inspector to cite the section of the California Plumbing Code that is being violated. So ask the inspector for a code reference. Cheers, Wayne

Sure. Cheers, Wayne