dumping gray water, apparently no vent?
Black water dumps fine. Gray water tank is obviously not vented. Should it be? What can I do to overcome the vacuum issue while dumping?
Forum Discussion
The black and grey tanks often share a roof vent, but you could also have air admittance valves under the kitchen and/or bathroom counter tops. Those valves sometime stick closed. They usually unscrew from the pipe fairly easily, and only cost a few dollars at home improvement stores.
