water pressure

I currently live in Mexico and the houses here use gravity feed for the appliances, faucets and showers. The concept is good but because of this there is little hot water pressure. Several ideas I heve been thinking about are 1. See if there is some kind of booster pump I can install in the hot water line. I don't know if if would work by intalling a pressure switch in the water line to at least pressurize the water line or if I would have to additionally install a pressure tank.

Any ideas would be welcomed.

A couple of ways you could do this:
1. use a flow sensor to turn on a pump. Lots of on/off cycles which would decrease the life.
2. add a pressure switch, bladder storage tank, and checkvalve (pretty much the same system as if you had a well). Pressure would cycle between the max and min settings. The pump would turn on, pump water into the bladder tank until the max setting was achieved, then turn off. The stored water in the tank would feed the house, decreasing the pressure until the min switch closed, turning the pump back on. Most switches have a 20# difference between max/min. You could set this at say 40/60, or adjust it up or down. If you add a cycle stop valve to this, your pressure would be fairly constant, but the pump would run longer while running water.

If you ever ran out of water in the tank, you'd want a level switch to turn the pump off in case it ran out of water...running a pump without water will ruin it quickly.

Read through some of the stuff in the pump/well forum here and you'll get the idea.