That is a different problem. Your flush valve seal (aka:flapper) is shot out. Unrelated to your high water pressureI actually realized last night that the toilet in our bathroom was connected. I had added red food coloring in the tank and found the water in the bowl turning pink. When I took my shower I heard the toilet run and then the clank. It was constant for a few mins and I decided to turn off the water to the toilet. It became silent. This morning I turned the water back on and it began beating again. I plan to change the flapper and the valve this weekend.