Hello All,

Has anyone else had trouble with their plunger-type epoxy pumps? I just had another one go bad. During the downward pump stroke, it spits a slug of air. There must be a bad seal or check valve that lets air in during the up stroke even though the pump is almost new. Is there a fix for this? For some reason, it is only the resin pump that I have had trouble with. I tried heating the resin and pump thinking that there might be some crystalized resin gumming things up, but it didn't help.

Thanks,

Jon