Upon arrival spoke with customer and he made me aware that there is no issues with heater but it’s in the attic and he would like it replaced before it bust causing damage to home or a holiday when he has company and no one can come to replace it Heater is a 13 year old 50 gallon natural gas world pool heater in attic with stair case gave customer options He would like the weekend to thank about it and call Monday with his decision