I am preparing to put a facet 40106 electric fuel pump as a backup for my Rotex 912ULS fuel pump. I was told the Facet has two in-line check valves as part of the electric fuel pump and it is not necessary to add an additional in-line check value with good fuel filters in place. Does anyone have experience with adding an electric fuel pump and an additional in-line check valve?
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Re: in-line check valve for electric fuel pump
by Rotax-Owner » 2 years ago
This pump does not have an anti-siphon valve or a one-way valve, so fuel can flow in either direction when the pump is off. https://www.pegasusautoracing.com/productdetails.asp?RecID=83
Rotax recommends/requires a bypass check valve around the electric fuel pump so that in the event the electric fuel pump fails or is turned off, fuel can still flow around the pump and feed the engine.
Please see Chapter: 73–00–00 ENGINE – FUEL AND CONTROL in the Rotax installation manual for more information - https://www.rotax-owner.com/pdf/IM_912_Series_Ed3_R0.pdf
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Re: in-line check valve for electric fuel pump
by Phillip Barnes » 2 years ago
Thank you for the information. I think I misunderstood the person I was talking with in regard to the one-way (bypass) check valve. I have read the Fuel and Control in the installation manual and needed clarity on the check valve.
Thanks also for the link to Pegasus. I have not used this supplier.
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