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Soap Pump Dip-Tube Extender Coupler
This 14 mm × 46 mm coupler extends a soap or lotion pump dip tube that's too short for a taller refill bottle. The pump's original tube pushes into a tapered top socket that grips any tube from 3.6 to 8.4 mm OD. A 4.3 mm bottom socket, 14 mm deep, holds a length of standard 4 mm OD PTFE tube that you cut to reach the bottom of the bottle, so the pump stops drawing air when the bottle is half empty.
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