I only use my toy hauler 4 or 5 times a year. Do you drain the water tank if its going to sit for a while then put in a fresh tank before each use? I usually put 1/4 cup of bleach in when I fill t...
Here in this Az heat I drain it then put back a couple of gal to keep the valve from drying out. I do this once a month in summer. Bad things can grow in it. But I want the valve wet. I also keep water & toilet valve treatment in the bowl along with 4/5 5gal bucket of water in the trailer.