Hi. Came across your website while doing a search. I would like some help on a problem.The flush pipe that delivers water down from the tank to the lavatory pan is leaking. The leak is from the end connecting to the pan water inlet. Unfortunately, the lavatory model i bought does not have an protruding water inlet. I could have stopped the leak with a rubber cone stuck between the pipe and the inlet.For the model that i have, the inlet is just a hole at the back of the pan. The pipe just sticks into the hole. The plumber sealed the inlet area with a thick layer of silicon sealant, but that has shrunken with time and water began to seep out everytime i flush.Is there a permanent solution to this probelm?Thanks.