We have a 20.63-1 and the water pressure limiting valve seems to drop our water pressure to the point where it just dribbles out of the external shower. Also inside, the pressure is quite low. Has anybody had this problem? Has anybody removed the limiting valve and made an external valve adaptor that can be used in high pressure areas? Is that even a good idea? Any advice guys as it is really a pain in the butt. I didn't have any problem with any of our older expandas.