Patent ID: 7077160

Claim:
A water pump apparatus for residential applications comprising: a supply conduit; a residential conduit; a first pump having a first inlet conduit connected with said supply conduit; an outlet conduit connected with said residential conduit; a first motor for driving said first pump; a first check valve in said first inlet conduit; a throttling conduit connecting said first inlet conduit to said outlet conduit downstream of said first check valve; a third check valve in said outlet conduit downstream of said throttling conduit; and a pressure switch connected with said residential conduit and transmitting a start signal for starting said first motor when the pressure in said residential conduit is less than a predetermined minimum pressure so that said first pump recirculates fluid through said throttling conduit until said third check valve opens responsive to a predetermined minimum pressure being established upstream of said third check valve, thereby permitting said fluid to discharge into said residential conduit.