Went out this weekend to do a small repair job. customer asked me if i could give her a design of her system. I told her i did not install the system but could provide a head and valve location. so I turned on the system did the head placement and broke out the 521 and found the valves, I had drawn down the everything and had given her the design, she looked at me and said "where are all the pipes" i looked at her and said "there's know way i can trace the the laterals unless i dig up the whole yard". I asked here to contact the company for the asbuilt and she told me they are no longer in business. then she told of how great of a price they had gotten on the system. the contractor told them to pull a homeowner permit and the would install the system for less. after hearing that, I told her, well the only way to get all the lines in the drawing is to replace the whole system, she looked at me like i was stupid and and said the system is only one year old, I then told her that while doing the repair i encountered a lot of sch40 pipe. and showed her the flaws in her system of not performing correctly. I normally do not criticize someones system in front of the customer, but she asked for my opioion. what would have ya'll have done?