Yup, same problem here, but just a slight leak. A common brass elbow replaces the unit that connects to the pex under the sink and get a hose connection "backflow" preventer from Lowes, etc. and install it on the hose connection in your water compartment. The factory unit is small, a piece of crap (pun intended), and restricts full flow and you will get more flow to flush the tank. The one installed by the factory is there to meet ANSI standards and with the elevated rise and a backflow preventer installed on the inlet, you have the same thing. This is why the parks have backflow preventers on their supply valves.
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