Portable holding tank

silverstreak101 · Jan 20, 2011

We have a 271/2 ft. Shasta motor home and plan to add an additional holding tank under the bed. My question is where to put the additional portable tank to hold the black water and then how to empty it? Any advice would be greatly appreciated.

Thanks, Marsha

Ned · Jan 20, 2011

The tank will have to be lower than the toilet draining into it. That would preclude putting it under the bed unless you plan on raising the toilet.

Water Dog · Jan 20, 2011

silverstreak101 said:
My question is where to put the additional portable tank

Your question included the word "portable". Are you talking about one of the blue tanks with wheels like these?

maddog348 · Jan 20, 2011

Wow I read that 'potable' the 1st time thru. Glad the 'r' is really there ;D ;D ;D

silverstreak101 · Jan 20, 2011

Oops, yes, the blue tanks with the wheels.

Marsha

tvman44 · Jan 20, 2011

anywhere you can find place for it, some put it in the TV. I put ours in a storage compartment. I have seem several people keep it strapped to the ladder on the rear.

Gary RV_Wizard · Jan 21, 2011

The portable tanks are carried anywhere you can find room, usually somewhere outside, since a certain amount of spillage is inevitable. You dump the main holding tank into the portable and take the portable to the dump station and tip it up to dump it there. It should come with a standard 3" sewer hose for that purpose. The larger ones have a tow handle that can fit over a standard ball trailer hitch for towing (slowly!) to the dump with a car, while smaller ones can be loaded into truck bed or trunk.

Water Dog · Jan 21, 2011

Gary RV Roamer said:
You dump the main holding tank into the portable and take the portable to the dump station and tip it up to dump it there. It should come with a standard 3" sewer hose for that purpose.

Just curious Gary, since I've never used a portable tank in conjunction with a fixed tank. Wouldn't it be kind of chancy trying to partially dump a larger main tank into a smaller portable tank? Seems like it would be easy to wind up with a full sewer hose with nowhere for it to go, or do you just have to be quick on the shut off valve?

Portable holding tank

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