Rally Road now offers a siphon pump kit that can be placed on the pump side of the fuel tank.
Here's how it works: The fuel system return is routed to the pump side of the tank instead of the usual non-pump side. Inside the tank, the return fuel goes through the siphon pump and into the sump bucket. The flow of the returned fuel is what powers the suction on the siphon pump. This constantly pulls fuel from the non-pump side of the fuel tank (through a hose attached to the black fitting). No electrical pieces means no extra wiring needed. No secondary transfer pump means nothing to fail.
Two nozzles (Green and Gold) are provided. Green is for two pumps running full time. Gold is for a single pump or staged pumps. The different nozzle sizes vary the velocity of the flow and therefore how much suction is created.
Siphon pump body (blue)
Suction fitting with Viton o-ring (black)
Nozzle1 with Viton o-ring (green)
Nozzle2 with Viton o-ring (gold)