I understand what you're saying and it makes sense. But my trailer has two "low point" drains, one for the hot and the other for cold. I only opened the hot drain, not the cold. Would this still cause sentiment problems?
The hot connection is at the top of the tank so it will not drain it.
2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 100W solar panels