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When we have full hookups, my husband often starts dumping, then goes off to do other tasks while the gray tank dumps. Sometimes he'll leave it open as long as 30 minutes while he finishes other things. Will this cause any damage to the tanks? Is this okay?
As I drain our black tank all drains nicely and the fresh water flush works good to rinse everything out. Then when I pull the gray tank drain, there is a big flush of water out for a few seconds and then all stops. I can see at the clear collar up at the tank outlet shows no water flow (it is full of water). I can hear water trickling at the elbow into the camp site drain. After a few more seconds, the water starts and rushes down and drains completely. I'm guessing that the drain gets air locked and it's taking some time for the water level in the hose to go down enough in order to allow air back up into the hose so that the rest of the water can come out. Isn't there an air vent on the roof of the coach that should inhibit this situation? Is this telling me that my air vent is blocked? This seems highly unlikely that a large diameter vent would be so totally blocked so as to not allow ANY air flow. Am I missing something else?