Not a problem...You can buy a plastic extension piece in any plumbing supply
or Home store that will add 1/2 inch to the flange height. You can also get
a special wax ring ( I got mine at Home Depot) which is thicker and has a
plastic insert, made for just this purpose. It costs about a dollar more,
and is supposed to work with the flange up to about 3/4 of an inch below the
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