You could try and modify the standard shower head to remove the restriction and that can help. But there is another way to magically increase the output pressure of your shower head. Replace it with an Oxygenics Body Spa shower wand. The shower head uses a venturi effect to raise the pressure output and provide you with a much nicer showering experience. This mod is so easy that you will wonder why you didn’t do it sooner. Just unscrew the standard shower head and screw the magic one on.
The output is also adjustable, providing a low pressure trickle to a full blown high pressure spray. At the base of the wand is a circular adjuster you simply twist. The only drawback of this mod is that you lose the ability to completely shut off the water supply. The standard shower head allows you to almost stop the water flow using a valve on the back of the head. This feature doesn’t exist on the magic wand. So you might consider adding a ball valve in between the wand and the water supply hose.
For pictures and resources for doing the magic wand shower head mod, head on over to ModMyRV.com and have look at this article:
http://www.modmyrv.com/2009/01/01/rv-magic-shower-head
Happy modding!