URL Rewrite without Redirect

Can you just set up a pool, put "www.somesiteB.com:4444" in it, and then send the web user connection to that pool with an iRule?

Create a pool with the node: www.somesiteB.com:4444

Create a virtual server that responds on an IP that the domain "www.somesitea.com" will resolve to.

Add the loadBalancingiRule iRule to this virtual server.

 
 rule loadBalancingiRule { 
     when HTTP_REQUEST { 
         set http_host [string trim [getfield [HTTP::host] ":" 1]] 
         set http_host [string tolower $http_host] 
         if { $http_host equals "www.somesitea.com" } { 
             pool somesiteB_pool 
             return 
         } else { 
             HTTP::respond 404 content { 
              
               Not Found 
                
                 Not Found 
                
              
             } 
         } 
     } 
 }