I am running two RSM 130/130D. I have been running these tanks for 6 years without any major issues. I recently been having issues with the Power head not re-starting after I have turn them off during maintenance. In the past I have just swapped them out with new ones but that doesn't seem to help. Reading RSM help page they indicate that it can be caused by air trapped in the pump. This would be consistent as on a number of occasion I have removed the pump only to find it works fine in a bucket. Any one have similar problems and is there a recommended fix. I have started to look at alternate pumps to see if they not as temperamental.