Hopefully it works out for you. They require the product to be returned in "as-new" condition. They very well could refuse the return since these pumps are pretty much used as this point and not "as-new".
We will refund you for your purchase (minus the shipping cost), provided the returned item(s) are received back in their original packaging, along with all accessories, warranty cards, manuals, software, cables, etc., where applicable, provided your purchase is in "as-new" condition. When your return is received, you will be issued a refund to your original method of payment (your credit/debit card or PayPal account, for example) for the merchandise only.
Lets hope, I mean I wont send it back dirty, I'm going to clean the CRAP out of it just in case.
