I need to install a line for a water hose on my mobile home. Need instructions.

Since you've failed to inform us of any details, such as the material the present pipes are made of, or, where you will be coming off the cold water main, we can only give you a general answer. Cut in a tee into the cold water main and run over to a 1 /2" drop eared ell that you will secure to the outside of the trailer. Now tape the threads of a 1/2" boiler drain and screw it into the drop eared ell and you have just added a hose bib to your mobile home. Good luck. Tom