How do I Install Toilet Flange to Stubbed Pipe in Concrete Slab

[kailor]

I need to install a toilet in my new garage. The finished floor is the slab itself. I have cut off the 4" PVC stubbed pipe basically at the slab surface and when I lay a level across the top of the pipe/slab I see that I don't have a perfectly level surface across the slab and pipe. Before I cut the pipe off at the floor, the pipe showed to be very true and perfectly plumb. I have a few questions.

1. Can I use an angle grinder to level the slab/pipe area? If so, what type of grinding wheel? Or should I use an oscillating tool?
2. What is the best type of flange to use? One with a metal ring on top of PVC (one piece)? I know how to align the bolt slots. The flange I will use is the kind that will fit down into the stubbed 4" PVC pipe (Oatey, Sioux Chief, etc.).
3. Is PVC cement enough or do I need to drill holes and further secure the flange with tap-con screws (or please suggest some other type of fastener)? If so, How many flange holes should I utilize to do this?

All help is appreciated and thanks in advance.
Keith

 

[Cacher_Chick]

If the pipe is 4", you will be fine with any of the flange varieties which seal to the inside of the pipe, and have a stainless steel ring to secure to the floor. Make sure to line up the t-bolt stots properly so the the bowl will be straight when installed when you mark where the holes are to go. Tapcons rust away, so I prefer to drill holes for lead concrete anchors, and use stainless steel screws.

 

[Sponsor]

 

[Reach4]

You could also use Push-Tite Gasketed Closet Flange (887-GPM). It could be unscrewed later, although the need for that is unlikely.