All ActivityMost RecentMost LikesSolutionsRe: Grey water tankMust be a touchy sensor. I moved the coach a short distance & now the gauge reads empty. Thank you for all the responses!Grey water tankGrey water tank won't drain.Just dribbles out. I ran a 15'drain auger all the way in and still nothing.Gauge shows full. Bad gauge or sensor? When that tank is overfull it usually backs up into the shower but it has not done that.