To bypass or not to bypass, that's the question!

Hi Mark, 

I have a low wing, with facet boost pump. I have installed a bypass system for the pump but no additional filter. My only fuel filter is a gascolator between facet & mechanical pump (Note all my refueling is done through a filter funnel).

Thinking out loud:

Your high wing tanks may deliver sufficient fuel flow to the carburettors, without  the need of a boost pump ie gravity is giving you built in fuel supply redundancy. This would need to be checked before making a decision one way or the other.

Installing a boost pump has potentially added a point of failure, than can only be mittigated by having a bypass system.

Not sure, however Facet pumps are supposed to fail open (maintain flow).

Fuel flow is what the carburettors need, not fuel pressure.

I guess I am suggesting that , with reserve fuel in your tank(s), you measure your gravity fuel flow at the carburettors - if sufficient to maintain engine operation, ditch the boost pump & its added complexity/potential failure point.😈