I have very low water pressure for my showers, at least lower pressure than I would like. I removed the water saver device on the shower head, but I still dont have the pressure I would like. I read somewhere on the internet that there are specific pumps that connect to the shower that will increase the water pressure to that shower head. I also read something about combination pumps and thermostatic controls for a shower. Could you tell me where I could find such devices in the U.S? Also what is involved in having them installed. The ads i saw on the internet were from a company in Germany.Thanks