Come and done work at our house for drain fill. Doesnt work. He argued and said it wasnt his side but if so hed fix it. Plumber come out and sure enough his side is full of water backing into the tank. He emptied the tank said that should fix it. Now full again. We called him back. He said well I dont know what you want me to do. 3000 dollars and found out he had put the new system over the old blown system.