Hi, I don't think I clearly understand the question ...
1) If you change the fuel pomp it is better to choose good brand, avoid the cheapest ... usually I put Valeo/ SKF/ .. or some other which are mount on news car and will be strong.
I had put a bad clutch (2 time less expansive) and it done only 20 000 km ... that 's why now I only put the best.
2) If you live in very cold area ... like atlantic ^^ I don't know what to do to have better result with the fuel pump in cold enviroment.