Sea Ray

I remember seeing a couple of articles about this and always thought about giving this a shot... try Vodka! - https://forums.sailboatowners.com/index.php?threads/using-vodka-to-winterize-fresh-water-system.134804/

hahah.. shot... no pun intended!

I cut into my holding tank and it was clean. The source was the hot water tank and it penetrated the hot water piping. Flushing the HW tank with bleach and replacing HW tubing

Make sure you have gotten all the Red antifreeze out of the hot water tank, if you have a compressor blow out the hot side and see if you have the red antifreeze, then use one to cups bleach in the water system and let it sit about two to three hours after you refill the hot water tank, then flush with fresh water. I did my neighbor boat last summer and he said all the red pop was out, I took about 1/2 gallon of red pop out of the hot water tank with the attaching the compressor up to dock side water and putting a drain hose on the drain of the hot water tank. The smell all went away.

All good suggestions. My recommendation is to run all faucets and the head after you fill the the system with the bleach (only 4-5 oz bleach per 20 gal of water capacity is all you need). Then leave the bleach solution in the system for at least 24 hours before flushing it out with fresh water. That should do the trick and get all the lines cleared as well as the tank. If not repeat the process. Good luck.

If you are referring to the potable water system, run the bleach water out the faucets throughout the boat to ensure they are clean. Worked for me.