Ian wrote:
Just installed a new Kohler Cimarron toilet in a rennovated bathroom.
When I flush it seems as though both the tank and bowl fill but then
once the tank is done and shuts off the bowl starts to drain and I
hear water trickling until the bowl is almost empty.
Anyone able to offer a suggestion as to what's happening?

thanks
Ian

If all (or almost all) of the water drains out, there may be a
crack/flaw in the bowl and the water is just leaking out. Slowly pour
water in the bowl until a normal water level is attained. If the water
level drops, there is a problem with the bowl. If the water level stays
the same then you have a vent problem.