This is a chemical dosing pump that should handle acids as strong as they make them. It even says that it will handle hydroflouric acid, you know, that stuff that dissolves human bodies on TV? I shut it off and will call the company after the holiday to see what the heck is going on. The tubing is HDPE ( high density polyethylene) and it is handling the acid just fine. The pump body and mechanism is handling the acid just fine. The stupid valve fittings are the problem.
Here's a picture of the problem: