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P0171 - found broken vacuum hose - but is this a check valve?


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Chasing a P0171 and found a broken / dry rotted vacuum hose right away. Going to replace it but noticed it has what looks like a check valve. If it is a check valve it is bad - air flows easily both ways. Can anyone verify the yellow circle in the attached image is a check valve? And if it is what is the correct orientation for flow. I do not see arrow on it. 

Thanks in advance.  

subaru vacume leak.jpg

Civilization has brought Evolution to a screeching halt

2007 Legacy GT auto

1989 Turbo Trans AM

1987 Buick Grand National

1983 DeLorean (Buick turbo transplant)

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Silverton, thank you. Found it about 10 mins after I posted. Left the filter and replaced the vacuum line and all is well.

Civilization has brought Evolution to a screeching halt

2007 Legacy GT auto

1989 Turbo Trans AM

1987 Buick Grand National

1983 DeLorean (Buick turbo transplant)

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