Pump Sprayer Seal
While spraying for insects suddenly yhr little drip cup on the top of the sprayer was full of liquid. Discovered the little rubber seal at the bottom of the pump that lets air in the bottle was also sucking liquid back into the pump.
Measured and modeled from the original molded piece. I haven't printed it yet so I don't know for sure if it fits or works. I will update when I get it done.
Print with a soft TPU (<90A)