Do they make an EXTENDED 4”x 4” spigot style PVC closet flange? My 4” fitting is below the tile and encased in concrete, and my 4” spigot closet flange will only end up being about 5/8” into the fitting once the floor is finished and I solvent weld the closet flange into the 4” fitting. Or, is 5/8“ into the fitting enough for the toilet? The entire length of the spigot is about 1 3/4”. Thanks for the advice!!