Why do so many people throw away their owner's manuals and receipts? So many people spend so much money on electrical products, from pumps to nav systems, and don't bother to save these documents. Every time I make a major purchase I staple the receipt to the owner's manual and file it away. If I need a part in the future, the manual with an explosion diagram of all parts is there, with the receipt in case there is any doubt about warranty claims. How much do you really want to trust your retailer????