I ordered this item, and a different part as well. The website checkout wouldnt let me enter a PO Box because it said they shipped using fedex. The item was shipped via USPS, and therefore it was returned to the sender due to lack of a PO Box. I emailed customer service who asked for the tracking number. The tracking clearly showed it had been delivered back to the sender successfully. After I sent the tracking number I didnt hear back for a few days. I emailed again making sure that they had gotten the first email. This annoyed the customer service person who emailed back asking me not to send multiple emails, and saying they had told me in a previous email they couldnt find the part. I had never gotten a previous email. I apologized, and never heard back again. I tried again with a different customer service rep and never got past the tracking number. I apologized to both people for upsetting them, and just ordered the same part again. This time they let me put a PO Box, and the website didnt say it shipped via fedex. I never got a refund for either item. They make great pool filters, but the customer service people are easily annoyed. Maybe they are overworked. Who knows, all i know is i never got the items i ordered, or a refund.