You don't need a return tube. The PVC is the return tube. The air from the blower will force the air already in the PVC to go somewhere, and the only somewhere should be through the PVC back into the kegerator. Just don't seal the PVC off at the kegerator end, leave it open enough for air to comeback.
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Sometimes when I reflect back on all the beer I drink I feel ashamed.
Then I look into the glass and think about the workers in the brewery
and all of their hopes and dreams. If I didn't drink this beer, they might
be out of work and their dreams would be shattered. Then I say to myself,
"It is better that I drink this beer and let their dreams come true than
be selfish and worry about my liver."
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