Hi Killeen,
I just was maintaining my waterpump. It is a GRUNDFOS mq3-35-B. A very silent pump which can run on 120 or 240 VAC.
It has a buid in pressure tank and pressure switch. Besides this one I do have a Shureflo, 12 volts, as a backup.
Go to www.Bigbrandwater.com and they do have the cheapest ones: $ 399.99
I am very happy with the flow rate ( 22 GPM ) and the waterpressure ( 51 PSI )