Primer pump
 

What are you using for primer pumps.
Where can i get 1.

Sorry I've been away so long. I'm looking at the various low flow water pumps for RVs and boats (they usually run a small faucet). The nice thing about these is they are automatic up to a set psi (usually 35-45 psi), so they turn on when the high pressure pump is drawing upon them, and then off when the back pressure is reached.

These also tend to be quieter than say a wiper pump.