Hey all, Just a couple things im sure can be easily answered.. Need a pipe thats big enough to swim through, What should me interior size be to allow it? (there will be turns in the pipe but sideways and up/down. ) just not sure what a good interior unit width/height should be... 2nd, I want the pipe filled with water .. I presume this is simple as making an interior solid brush through the pipe and making it func_water or whatever it is.. and 3rd, im thinking of adding current ... my current idea is to use a Push entity to push the players along .. but perhapse there is something else specific to water for current ? any tips would be great So far everyone has been sooo helpful, thankyou a great deal.