gabriel wrote:
I've wondered about putting a tank on the 2nd floor of the house.
(Like a

This is exactly what the third world countries do (except the tank is
on the roof). Large cities do not have a good water system, so they
"rotate" water pressure around the city. Your house might get water
for 8 or 16 hours a day, for example.

These places have one or two reservoirs on top of the house, all the
water into the house (and the water heater, etc..) comes from the
reservoirs. The rich people have an additional underground reservoir
that feeds the reservoirs on the roof through an electric pump
(either manually or automatically operated). This is a lot of water
that gets stored!

With a properly-designed system (you'd have to hire a 3rd world
engineer, but they really have the physics of this down), you can get
a decent gravity-pressurized water system. The water pipes have to
be sized and routed correctly.

Thanks! Your reply is a keeper!

-- Mark