We purached a water heater vault from SupplyHouse.com. When the parts came, we were unable to install it as the threaded interface was wear and tear. We suspected it was a used part. We called their customer service and explained it was a defect product with all the detail information they required. Finally they replied that the part is not returnable as we unpacked it and tried to install it. We did not even take off the tapes of the parts how could they determined we used itwithout looking at the product. They sent several emails trying everything they could prvent me from returning the part and getting the refunds. We are very unhappy with their services. I feel we got cheated.