Update -

I put some silicone lube on the gasket and vacuumed again and there is less crud. I also found a split in the vacuum line, I don't think this had anything to do with it as it would be a "sucking wound" in the line and should not be discharging but I also duct taped that. Hopefully I can finish the season and get a new flomax valve assembly over the winter. It's a stinker, 100 dollar part VS. a 20 dollar gasket.

Wayne