Toilets, Sinks, Showers, Tubs and Disposals - flushmate pressure assist

I have a series #503 American Standard toilet tank with the series 503 flushmate pressure assist, and would like to know if the tank is interchangable with the original low-flow flushing toilet bowl, or do I have to get a special type bowl to match the pressure assist tank. All the mounting bolts and holes seem to match up, but need to know if they are compatable with each other. Thanks :confused:

Flushmate pressure-assist tanks cannot be retrofitted into existing toilets. The units operate in conjunction with specially designed toilet bowls, and will not function if installed in a gravity-type bowl. A bowl designed to accommodate Flushmate pressure-assist tanks has a larger trap way with fewer bends (where the waste is evacuated), smaller raceways (where the rim-wash comes from), and the jet-hole (which forces the waste into the trap way) is of a smaller diameter and faces into the trap way. Gravity bowls have smaller trap ways with more bends, larger raceways, and the jet-hole is typically directed frontward, into the bowl itself.

Many people assume this is a Flushmate marketing ploy but it's basic hydronamics.

Hope this information helps.