i have a 39 ft toyhauler with 100 gallon fresh, 2-60 gal gray, and 60 gal black, what is the correct way to drain and flush after being hooked up at campground, thanks,
ALWAYS drain the BLACK TANK first. By doing this you are using the gray to rinse the drain hose from what has just went through it.I have never heard of a TH having a 100gal fresh water tank or 2-60 gallons gray water tanks. remember that water weighs in at 8.34lbs per gallon. Now do you see the extra weigh you have. :laugh: :laugh: :laugh:
I for got to add, when hooked up to a sewer connection, never let it just run freely, let the tank fill till it is about 3/4 full then empty. This will help in preventing a pyramid effect from happening. :laugh: