Toilet Cast Iron drain replacement

[JorRa]

Hi all,
New poster on the forum, been lurking a bit. I have an upstairs toilet that was leaking. Long story short, there is a hole in the lead bend so it needs to be removed. Cast pipe is 4". It had been worked on before based on cut planks when I tore the floor off..The hubs of the cast sit proud of the floor joist so I want to get those out. I am thinking of cutting the section between the 45 degree elbow and the stack and then replace with 1/8" per foot pitched 3" PVC and a shielded Fernco on the remaining cast pipe.

My main question is, will a horizontal 45 degree PVC elbow cause problems or should I do two 22.5 degree elbows for less of a tight turn? is there a better option for this bend? Toilet needs to stay where it is.Thanks!

 

[Terry]

There is no problem using a 45 there.
Measure the old cast, sometimes it's more of a copper size, 4-1/8" OD
I sometimes use a copper to plastic coupling there.

 

[Sponsor]

 

[JorRa]

Thanks Terry!

Another question.... I got the PVC in but the closet bend inlet is not quite level, about 1/16" to 3/32" out of level being lower on the back side. If I put a 1/4" pitch on the long pipe, i can get it level but from what I read, that will be too much pitch. What would you do, live with an 1/8" pitch and slightly out of level flange, 1/4" pitch and level flange, or start over to get a 1/8" pitch and level flange?

 

[Reach4]

If I put a 1/4" pitch on the long pipe, i can get it level but from what I read, that will be too much pitch.

Where did you read that?