The previous owners of our Barth used that sweet smelling red RV antifreeze. They didn't install a by-pass system on the hot water tank. I have drained and flushed the system, but I still get a smell of the anti freeze when I use the hot water. I was wondering if any of you ever had this problem before and what you did to get this stuff out of your water system. We don;t use the water in the tanks to drink or brush our teeth. It is nice to be able to rinse the dishes with hot water, but I worry about the chemicals on the plates and what ever we eat off.

On boats when this happened ---we would rinse out the whole system with vineger -- work pretty good---- don't over due the vineger dose -- 2 easy times-- not a strong one time deal or you then have to fight the vineger -after this-- place some water freshner in ---think this will make a big improvment--- Fred

The taste is from the propylene glycol that is used. It is considered non-toxic and at the levels experienced of no concern other than the odor.
I used to have this problem with my system and my solution was to remember my early training, triple rinse using low volumes. I fill my fresh water system with only about 2 gallons, just enough to be sure it will pump to pressure, and leave the hot water system loop closed until I have flushed each of the cold faucets and no taste or odor is noted. Refill the tank with the 1-2 gallons each time it runs mt. I then repeat this for each of the hot water lines, don't forgtet the shower. After all lines are cleaned I then reconnect the hot water heater and with the drain open flush water into it repeatedly until it empties with neither odor or taste.
I say I used to do this. Now I take the tank out of the loop and drain the hot water tank and apply the trusty shop vac to the drain line until it is empty. The other systems I suck dry with the shopvac loop the surge tank out of the line, then add the red stuff to the supply tank a gallon at a time. After the gallon is added, I turn on the pump, open the furthest taps (H and C individually) and run until the color is the same as the jug. If the pump continues to run I add a second gallon. After the furthest taps are set, work backwards to the closest taps which should flow dark almost immediately.
After all is safe pump the tank dry, apply the shop vac to the lines and call it a day. Since I am doing this with a boat I save all the colored drainings and use them for winterizing the engines and genset.
Best of luck with the taste and odor.
Tim
P.S. If you have a surge tank in the system you will need to take it off line and flush it separately, it will almost never flush out otherwise.