Hello Ern, Thanks for your comment and we're sorry you don't find this satisfactory. The adapter included in this hose kit can be used to connect it to another 2-1/2 inch hose. We're interested to know what's the exact issue that led you to rate this product with one star. If you'd like to discuss the matter and get help, you may call our Customer Service at 1-800-474-3443 from Monday through Friday between 8:00 AM to 5:00 PM Central Time. Thanks, RIDGID