Why Does a Lotion Pump Lose Prime? Causes & Fixes

Transparent lotion pump bottle showing air bubbles around the dip tube after loss of prime

Direct answer: A lotion pump loses prime when the product column drains back or the pump chamber fills with air faster than the mechanism can create suction. The usual root causes are an inlet check valve that does not seal, air leakage at the dip-tube joint or piston seal, a tube inlet above the product […]