4 inch main pitch

[justinberry]

This drain to city is at the farthest most point, beginning, of my system. It comes off the bathroom and includes the kitchen sink. The iron pipe coming from the house (directly from bathroom) is back pitched slightly with no clogs or problems as of yet. With my 4 inch straight main 50 foot to city, as shown in photo, is this too much pitch? PVC is booted to original "tar?" Pipe under slab.

 

[justinberry]

And once I've packed in all the fill under the concrete slab that is humanly possible what can I do to fill the uppermost part between the slab and fill so it doesn't settle and crack later down the road? The dugout goes back a foot and a half or so.

 

[justinberry]

Here is with the 22 elbow in line with the wye.

 

[justinberry]

Glued in. Good to go

 

[JG plumbing]

What's on the other side of the concrete wall? Why not bust the cast iron pipe out and run pvc through the wall?

 

[justinberry]

What's on the other side of the concrete wall? Why not bust the cast iron pipe out and run pvc through the wall?

A small bathroom with Tub/sink/toilet. Pretty good idea I hadn't thought of that. Knowing my luck though it would turn out to be complicated because the kitchen sink ties in to that pipe also. Could get rid of that back pitch on it too. Hmmm