Pump Voltage and Presure Tank

Pump Voltage
The pumps discussed here are primarily intended for solar-direct use at 24 Volts rather than 12 Volts. Larger home power systems are often based on 24 Volts, but smaller systems are 12 Volts. These pumps will operate at half-flow on a 12 Volt system. There is no problem using the pump this way. Pumps are available for voltages up to 180 volts. Higher voltages are an advantage with larger pumps because they reduce voltage drop and allow the use of smaller wire.

Pressure Tank
Get a "CAPTIVE AIR" pressure tank, not a "plain" or "galvanized" tank. Get a large one, like the 80 gallon size suggested above. This can store over 30 gallons of water, enough water to fill a small bathtub before the pressure gives out. Go bigger if you have the space and the budget. It CAN'T be too big. You can plumb more than one tank together to add volume, if it fits your space better, or if you wish to add to an existing tank. The tanks need not be equal in size. You can buy a horizontal or vertical tank (vertical tanks are cheaper).