On Monday, January 13, 2014 8:02:41 PM UTC-5, wrote:
On Mon, 13 Jan 2014 12:26:22 -0800 (PST), Ivan Vegvary

wrote:



Concrete floor. Metal ring well fastened directly to floor. Ring surrounded by ceramic tile approximately 5/16 inches high. Because of this height do I need to add a second wax ring seal or is one enough?

All replies appreciated.

Ivan Veg vary

I would NEVER use 2 rings - they make extra thisk rings for that

exact situation

+1

And the boxes at the stores should tell you what spacing
they will accomodate.