We were called out to an overflowing laundry drain After attempting to snake the line on the block was persistent. Therefore, the customer approved using a high-pressure Jetter to fully clear the line we completed the jetting and ensured line was properly flowing before wrapping up that portion of the job. While on site noticed water pressure to be extremely high at 130 psi , informed customer and customer approved replacement, replaced prv and left at a safe level. Also advised customer that thermal expansion tank had failed on water heater and water heater was nearing the end of its life. Customer understands and chose not to proceed with replacement. All work is completed and tested