Did the little white flappy thing that connects to that yellow piece get washed down the drain last time you cleaned your pump? (All technical terms we promise) Well fret no longer, pick up a 6 pack of membranes and never worry about losing one again.
Is your pump not getting the same suction it did before? Replacing the membranes can be one of the easiest and least expensive ways to trouble shoot your pump concerns. While made to be flexible, membranes can wear out over time. Consider purchasing a six pack of membranes if you are an exclusive or frequent pumper so that you always have replacements on hand.