A check valve is required as after the engine is turned off
the built up pressure left between the fuel pump and the fuel pressure
regulator has to escape. The exit of least resistance is through the fuel pump if
no check valve is fitted. The build-up of back pressure puts stress on the
pumps internals damage the pump.
A one way shuttle / spring type check valve. Often used as a one way breather valve on fuel tanks, allows air in without allowing anything to return.
Ideal for Bosch 044 fuel pump application
Suitable for Water, Fuel and Oil.
Opening pressure 0.5 PSI
Maximum pressure limit of 1500 P.S.I.
Internal Leakage: .01 cc/min. Max
It does not come with the fuel pump shown in the photo
Automotive / Aerospace-quality AN-6 to M12x.15 Black Anodised Billet Check Valve
Brand: Torques
Type: Fuel Filter Item SKU code: TQCVB-6B
Fitting Finish: Black anodized
Fitting Material: Aluminum
Quantity: Sold individually.
Check Valve, -6 AN to M12x1.5, Aluminum, Black, Each
Also Available in Blue and Red