virtual server and web app port

Hi, I have a question regarding the virtual server , can I use virtual server IP address with port 80 and let this virtual server point on pool which has 3 nodes running web application on port 5001. To clarify more I have done the following: from the pool from the "Resources" from the list I have selected the address of the node and then select service port to be 5001 and HTTP protocol I have successfully tested this scenario but I am not sure whether it is right or wrong? Do I need to redirect from http port 80 to http port 5001 like when we make a redirection from http to https by using irule (from 80 to 443) ?