Replace an Old Shower Head
Most DIYers should be able to replace a shower head easily. To remove simply unscrew the old head from the water pipe (check for and remove any set screws). Most can actually be unscrewed by hand. If not, use masking tape on the jaws of a wrench or a pair of Vise Grips (to prevent marring) and unscrew it. Turn slowly and hold the water supply line while you are unscrewing the showerhead - you don't want to break the supply pipe. Clean off the base and threads of the stem and then apply plumbers dope or tape around it. Visually inspect to make sure the shower head is straight and then hand tighten the new shower head on the stem and turn on the water to test for leaks. Not sure which shower head? ConsumerReports.org has points to consider and ratings (members only) or see a retail site such as Neatitems.