Can I add any pressure assisted toilet tank to any gravity toilet bowl? Will the drain hole and bolt holes line up?

Hi Diverugger...

I'm betting that you could line the bolt holes up without a problem, but the siphon/jet hole in the gravity toilet bowl simply won't be the same as with the siphon/jet hole in the pressure assist toilet bowl. Here, the siphon/jet hole in a pressure assist toilet is extremely small which concentrates the power of the water and allows for a proper and powerful flush. Most likely, if you use a gravity type toilet bowl you would find that the water coming out the siphon/jet would probably knock half the feces/waste out of the bowl and onto the floor... or all over you... ;)

The bowl is the cheapest part of the system... purchase the bowl with the pressure assist tank and you'll have no regrets!

Glad to discuss more if you want...

Mark