Can’t get any suction at all

Tina A

Noogling is my stress "bust"er. My avatar=My goal
Not sure what you mean by white caps, but it looks like both cups have the airlock valve. The butt Cups also has the insert piece that goes into the lock valve. Take that insert piece and put on the end of one tube and the other end of the tube hooked to your pump. Now you can pump each one individually and to whatever pressure you want for each.
 
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