Order of pulling gray H2O levers on Cougar 293SAB

rhagfo wrote:

ScottG wrote:
Since the kitchen gray water is almost as nasty smelling as the black, I like to dump in the following order:

1 Black
2 Kitchen gray
3 Shower and bath gray.

Doing it in this order gets the smelly stuff out of the hose.

X2

I like the stinky slinky as clean as possible when I put it away.

X3

We have the same setup. With a long enough hose, I empty the rear black first, take that hose, place on the front valve, and empty the front black. Then the two greys (galley and shower). That way the hose gets cleaned out pretty good.

I believe the rear 1/2 bath grey water goes to the galley tank, but can't be sure.

bpounds wrote:
I know it's not convenient or much fun, but with a longer hose you could probably do both outlets without moving the coach. Guessing from the photo, about 15' of Rhino would do the job. But NOT the blue/brown slinky style. The working length of those is never as long as they say it is. A Rhino stretches out and stays stretched until you purposely collapse it back down. No spring involved.

You're right, I have an extra length of sewer hose and could spot the trailer between. Thanks for the tip.

ScottG wrote:
Since the kitchen gray water is almost as nasty smelling as the black, I like to dump in the following order:

1 Black
2 Kitchen gray
3 Shower and bath gray.

Doing it in this order gets the smelly stuff out of the hose.

X2

I like the stinky slinky as clean as possible when I put it away.

With a little practice/ experience you will find the best place to spot the trailer at the dump station (take note of a reference point from the trailer wheels) so you can reach both outlets with your hose (or may have to buy a longer hose but a 10 footer should work.

I do mine the same as a previous poster suggested.
1. rear tank(s) first
2. black forward tank
3. gray forward tank last to flush the stinky stuff

I'm sure you'll figure it out quickly

I know it's not convenient or much fun, but with a longer hose you could probably do both outlets without moving the coach. Guessing from the photo, about 15' of Rhino would do the job. But NOT the blue/brown slinky style. The working length of those is never as long as they say it is. A Rhino stretches out and stays stretched until you purposely collapse it back down. No spring involved.

There are two dump connections on this rig. The back one combines the gray and black for the 1/2 bath in the back. I would prefer to dump from rear to front like bpounds suggests, but when it is busy, sometimes the next guy in line creeps up too close and it is difficult to back up as most do not realizs that I have two dump attachments. As previously stated, There is no flush system on the rear black/gray tank. I know the galley water is usually pretty stinky but we do not use enough gray water in the front bath to even flush the line very well as we always use the CG facilities for showers etc. Thats why I always end with the galley tank.

You will probably find that you don't have a flush system on the rear black tank. Only on the front black. So I would dump that rear black first, and run some water down the toilet or bath to get a bit of a flush.

Then front black, and then I usually open both grays at once. There is nothing gained by doing the grays one at a time.

I have also installed a blade valve at the outlet. I like to drain the black, leave the black valve open and close the outlet valve. Then open a gray and let it flush back up into the black. Then close the gray valve, and open the outlet valve to drain the black again. This uses some gray waste to help clean the black tank. Black waste never enters the gray tank. Gravity pushes it toward the black.

Since the kitchen gray water is almost as nasty smelling as the black, I like to dump in the following order:

1 Black
2 Kitchen gray
3 Shower and bath gray.

Doing it in this order gets the smelly stuff out of the hose.

We have two grays and one black in our Komfort rear kitchen. After the black tank drains I pull the galley as it has a long way to drain, then the grey tank from the bathroom tank.