On the very day I was installing this unit I received another unit from the Factory Pure supplier. I contacted them and advise them of the mixup problem. They claimed I ordered a second unit a day after the first unit. They refused to take it back without a restocking fee and refused to pay return shipping. Who would order a water heater one day and then order another one the next day? It’s a scam. So far the unit I installed is working as it should, no issues. But I won’t recommend people buy them online because you may get stuck with two of them and be out $600.