Customer had the bottom of 3 inch cast trench rotted out for line running from kitchen area to 4 inch cast. Replaced around 25 feet of pipe, cut out a 3x2 wye under kitchen to reconnect, and reconnected 3 inch pvc that was put in at the hub of the 4x3 wye. Tested all work thoroughly to ensure proper function and no leaks. Didn’t end up having to cut out the 4x3 wye. Reduced the price to reflect not having to remove that fitting. Made customer aware that there were other areas of concern on the cast that was left and more replacement is likely needed in the near future.