Grey water to exhaust pipe to empty when driving?

[quadnkev]

The guy that does repairs on my motorhome told me of a system
from the past that involved routing a grey water drain line to the exhaust pipe to use up grey water while driving.
Has anyone heard of this before?
With the stupid small tanks on my motorhome it seems like something to think about.
I am looking into a secondary grey water tank in the future at any rate.

[vanagon41]

Seems to me that would put out a cloud of steam when the water went into the exhaust pipe, might frighten other drivers.

[dons2346]

Read about such a thing in the FMCA magazine a few years ago. There was a coach mfg, long gone out of business, that used that same setup.

[BFlinn181]

This was done in early motor homes, but I'm not sure it's legal anymore. I tried googling the issue and guess I didn't word the search properly, nothing came up. I do recall reading about it but I've not seen any offering to market such a system lately, making me think it is frowned upon.

[nosticks]

It was called a Thermosan and it was used on some motorhomes of the time. It was used back in the days where you typically didn't have a grey water tank and the practice was to run a garden hose off into the brush for gray water.

[BFlinn181]

If you google Thermosan now find links to a meat thermometer!!

As I said before, since you don't see or hear about them anymore, I'm sure they are illegal. With which I would agree, not the nicest thing to have to wash off the front of your vehicle. Last time I read about one, it was on a '70s GMC motorhome. As a kid I remember the 'horror' of when I discovered passenger train toilets emptied directly onto the tracks!

[elmorc]

I saw a custom built MH a few years ago the owner was from Canada and he was here in Az. He had what he called his incinerator a large pipe about 16" dia.x48" long with the exhaust going through it. He said when climbing a hill and the egt was above1000% he wuold pump the black and grey tank into it and it would burn up all waste. We ask him about the brown residue collecting on the exhaust pipe and he said that happens when the exhaust temp was not hot enough, quite gross.

[bluepill]

With just 2 of us, we can usually go 3 or 4 days before the grey tank is full. I can extend it a few more days by dumping the grey water into a bucket and pouring it into the toilet, since the black tank is the same size and fills much slower.

[wa8yxm]

I found it a year or two ago with a Google Search, This works only on diesels, the higher exhaust temps and the slow "Drip' rate" of the liquid into the hot pipe insure that there is no cloud of steam. It is legal as the temps are way higher than what is needed to insure sanitary disposal of waste.. Way way higher.

Provided that is you do not use chemical treatments in the tank.

[Dunner]

Originally Posted by bluepill

With just 2 of us, we can usually go 3 or 4 days before the grey tank is full. I can extend it a few more days by dumping the grey water into a bucket and pouring it into the toilet, since the black tank is the same size and fills much slower.

I take long, hot, showers and have found myself standing in water after at times.

I took a spare water pump and plumed it so I could pump grey water into my black tank. It worked so good on my 5er, I transfered it to my MH. If it wasn't for the orange hose I use, you would think it came stock from the manufacturer that way.

[macantic]

To me it's nothing but soapy water,not harmful to the environment,so I just sneak out at night and drain it.

[Chuck 1935]

Great Idea, let er rip. It's only grey water

[Dunner]

It'll get you a ticket at the dunes.

[wildtoad]

It'll get you thrown out (or should) of most state parks I've been to. Gray water is not always just soapy water. Hair, grease, food bits, are just three things that come to mind.