Fuel Pump Check Valve / Non-Return Valve

External check valve / non-return valve for later original DeLorean / Bosch / all DeLorean Go fuel pumps. Comes complete with 1 copper washer for attaching to the pump, but you should renew the other two as well when re-making the connections.
One of the top 3 causes of hot start problems (along with the accumulator and the distributor o ring).
New fuel pumps come with this already installed.