Hi Hendersdc,
I think your right about the female-threads ripping the male-threads away from the bottle.
And I think you're also right that a water bottle's flat-ring functions to prevent the cap from being over tightened by the machine.
BTW: The mated pump and bottle are housed into fixed...
Hello Everyone,
The plastic thread on my HDPE bottle attaches to an ABS plastic pump (for a soap dispenser).
The plastic thread cracked. Maybe because the pump was screwed on too tight and it caused a leak.
Is this a design failure or a material failure?
Is HDPE the wrong material? (It tore...