Leveling WC waste stub when installing closet bend

[Smorrison0702]

Hi all,

I'm installing a WC waste stub under concrete slab and run in to a possible issue installing the closet bend. The primary waste line is about 1.5' deep, so I added a section of 4" abs using a coupler at the closet bend. However, in order to achieve 1/4" slope at the first (short) horizontal run, the vertical stub ends up not being plumb. This seems like it will prevent my future toilet flange from sitting flat when it is installed, however I also need the 1/4" slope at the horizontal. How do I remedy this?

 

[Breplum]

You could use a no-hub coupling to absorb the adjustment. Even a Fernco unshielded coupling will work fine.

 

[Sponsor]

 

[Smorrison0702]

That makes sense--thanks! For future reference, how does one go about introducing the 2% grade into a 90 degree fitting while keeping the vertical section plumb? Is the 'play' in the fitting enough to make the final angle more obtuse to get the right slope?

 

[John Gayewski]

That makes sense--thanks! For future reference, how does one go about introducing the 2% grade into a 90 degree fitting while keeping the vertical section plumb? Is the 'play' in the fitting enough to make the final angle more obtuse to get the right slope?

They don't. It's not always possible or perfect.