Yesterday the water pipe in the bathroom, (shut off valve) blew completely out of the wall with a force that knocked a picture off the wall. Water came out like a fire hose. With luck we were home and shut off water to the house and called our plumber. He replaced the unit in the wall and said he had no idea why it happened and had never seen it before? Does anyone have an idea as to why this happened? It appears that pressure had been building up?
