Grey water tank sludge
Helping a friend with her grey water tank issues. 2009 36 ft. Motorcoach The tank drains very slowly. About 4 months ago we drained the tank as best we could and then took apart the slide valve...
Forum Discussion
John Wayne wrote:
I'm betting she leaves the gray tank valve open whens she's parked. liquids run out but solids build up. After you get it cleaned out have her leave then valve closed till the tank fills and has more liquid to flush out the sludge. Heavy treatment of Dawn dish soap drive around for a while and drain. If it takes oil off shore birds it should work on the sludge. Have her do the Dawn each time she changes parks.
This.
When she is parked, she should leave the gray (and black) tank closed until it's almost full. Then dump the black, dump the gray. Both will do much better that way.
Before moving, add 2 cups Borax or Calgon water softener, and a cup of laundry detergent or Dawn dish detergent, to each tank. I would think this would work best with the tanks about half full Drive and let that slosh around for a while. Then fill the tank and dump. Repeat this every time before moving.
A lot of people add this to every tank, moving or not.
