Can I stack two wax rings on top of eachother to seal a toilet?

I have a toilet Im setting and theres a gap beetween the toilet and the wax ring. I already am using a taller ring and its in a poured slab so it will be a job to mess with the flange itself. Plus its a office building that I am leasing so I dont want to do anymore than I have to. Using two rings was suggested to me, but Ive never had to do it before. Always been able to use short or tall wax ring. Please if you dont what you are talking about dont answer. Thank you.

Ive already got a bigger wax ring with a polyethelene flange

The problem with using two seals is that there is a good possibility of one of them sliding when you set the toilet. This can block the discharge. I like to use extender rings if the flange is lower than the floor. You can get these at Home Centers and they come in different thicknesses to make up the gap.

You should be able to get a riser kit for the whole thing.

i have before a few times,although there's usually a problem you're trying to avoid when you do,it'll seal ok as long as you get the bolts tight

Two rings will probably work although they make a ring with a plastic sleeve in it that may work.

You can, but you're much better off using a thicker gasket with a polyethelyne ring embedded in it, otherwise known as a #10.

http://www.wmharvey.com/prod/cat3/noseep...

These are available at most hardware stores.

Maybe you can get a riser plate that will mount to your existing flange. Then attach the toilet to this plate. I'd talk the guys at your local Plumbing Supply - they might know of a fix for this problem...you surely are not the first to encounter this so there has to be an established solution.

Using two wax rings: I am certain the upper ring will seal very well between the toilet and the lower ring. However, I am very doubtful if the lower ring will seal to well...that is why I would not use the two rings - not to mention you are limited to the length of the bolts ( a riser plate will have its own bolts).

Here is a rule of thumb - if your pipe coming up is cast iron & jagged - use wax ring with no flange (the flange will compromise the seal because of the jagged edge).

If the cut is smooth - use the wax with the flange & yes, you can always double up with another that does not have a flange.

You can use 2 without flange or bottom one with flange & top one without flange - it just gets a little messy when you tighten down the bolts, but clean up is easy.

Sensible is right, use flange extensions to raise the height up to floor level, or slightly higher. You can purchase a kit with different size extensions, and 2 extra long toilet bolts. Follow the instructions, and you will be good to go!

I like Windee Thumpers answer.

I have used two rings many times without any problems. The most important thing after mounting is making sure the toilet is firm to the floor and doesn't rock at all. You can get special shims to stop rocking. Otherwise you may doing it again soon.

no,all you need is one,if you need more then one there is a problem with the floor,then you need one with an extension.