Travlingman wrote:
Flush out tanks about every 5 days. Last few times have flushed black tank 30-45 minutes. Already have the extra valve on it. Have had trouble since I bought it with the leak. At first it was just a little, but now pretty bad. If I can't find a chemical that can break it up, might put up with it until spring comes as I will have to take underbelly skirting off to get to it.
Have you talked to Heartland Customer Service yet? On a 2014 flagship model they may have some ideas on a fix and might even do a warranty repair if the valve is defective! Just a thought!