Originally Posted by pdonoghu
Check the screens on the interior faucets. Does the toilet flush OK? If not, sounds like a bypass valve issue.
Remove the faucet screens, sounds like your bypass valves were in the correct position. Also check under and in cabinets for kinked or pinched lines. Have you tried it on the pump with water from the tank? How is the pressure on that? Typically it will be a bit lower than city pressure but it still should be decent.