Call for toilet running. Discussed repair options and Mr. Robert elected to replace fill valve and flapper. During repairs however, I found that the flush valve gasket was deteriorated and also allowin*water to pass through. I spoke with Robert and explained the new findings. We removed the tank and rebuilt the entire toilet tank. The first flush valve tank to bowl gasket was not sealing properly and caused me to have to remove the tank and replace with another gasket. Due to lte hours and for customer service, I rebuilt the shut off valve at no charge. Tested toilet several times. Cleaned around site. Pressure read 50 psi.