We have recently received a few emails from WORX Trivac WG500 customers enquiring about how they can replace their Vacuum bags. These bags are not available on Amazon or at any of the retail stores like Home Depot, Lowes and Sears. I searched online quiet a bit and could not find any retailers selling these bags. So I called the WORX customer service number and this is what they told me. Typically if you have recently bought your Trivac and if the bag tore or was not in a good condition, they will send it to you for free. If not, then the replacement bags are $14 each (+ $4.71 for shipping) and can be ordered by calling the WORX customer service number at 1-866-354-WORX(9679).
Hope this information is useful for the folks trying to find a replacement bag. Please leave comments below if you were able to call the WORX customer service and get a replacement bag. This would be helpful to other readers as well.