Emptying black tank at home.

[dakota51]

Would there be anything wrong with emptying my black tank into a drain in my garage floor that is connected to the city sewer line. Do people do this?

[gkainz]

Originally Posted by dakota51

Would there be anything wrong with emptying my black tank into a drain in my garage floor that is connected to the city sewer line. Do people do this?

might get pretty messy and stinky while doing this unless you can pull the floor grate and get the hose somewhat sealed into the drain .... but if it DEFINITELY goes to city sewer and not storm drains, then should work ????

I dump into a cleanout I installed directly into my sewer line outside the house.

[JRTJH]

Most houses are built with two water disposal systems. One, the drains in the floor and the gutters are routed to the storm drain system. The other, the waste water from toilets and sink drains is routed to the waste water (sewer drain) system or the septic tank. These two are not connected in most city utilities systems and I haven't seen a septic system that connects to a garage floor drain.

Before you consider this, I'd check carefully to be sure that the garage floor drain is, in fact, connected to the sewer disposal system. If it's not, and if it's connected to the storm drainage system, or worse yet, routed outside the house via a 4" perforated drain line, that's designed to "perc the water into the ground", you could be in for some pretty stiff "legal maneuvering" to get out of the issues created.

Do a lot of checking and double-checking before you move forward with this plan. Besides, even if it is feasible, you're going to require some way to flush the waste far enough past the floor drain so it doesn't "linger" in the garage. And then there's the "hose drippings" that will be on the floor as you disconnect after use. What if you should happen to have a hose rupture? Hmmmmm

[dakota51]

The drain cover is removable and my hose adapter fits into the opening. I have checked that it is connected to the sewer line by dumping a bucket of water down the garage floor drain and it runs into the clean out located in the back yard(the same place the water goes when I flush the toilet).
Thanks for the input.

[gkainz]

another hint that a plumber friend of mine gave me on garage and/or basement drains ... they get used seldom enough that the water in the P-trap can evaporate and allow sewer smells back out. He recommended using a couple cups of vegetable oil down the drain to float on top the trap and keep the water from evaporating.

[Jim & DJ]

If your drain from the garage "has a p trap".