Some RV owners are truly fastidious when it comes to their water hookups. It is always smart to keep your drinking water (white) hose separate from the black hose connections and overall area. But one problem is that your water can possibly be contaminated by those who have come before.
One smart thing to do is to keep a spray bottle of bleach with your water hoses, or two bottles if your RV has water intake and dump areas in two separate parts in your RV.
When you go to hook up any connections, or when you are unhooking, take a few moments to spray all your connections. This includes the drinking water tap in your campsite – or even any communal ones – as this will help prevent any bacteria from transferring from previous users who may have cross contaminated.
Connecting a hose to drinking water? Spray with bleach. Connecting hoses to your grey tank or black tank? Spray with bleach. Do you re-use your gloves when dumping your tanks? Spritz those gloves too.
I also keep one in the kitchen for quick sanitizing needs.
Make sure you replenish your bleach spray every season or every few months. Bleach will lose its strength over time when in a spray bottle.
And make SURE you label any bottles you have filled with anything, even if it is just water. You don’t want anyone accidentally spraying anything out of a spray bottle that could be mistaken for something else.
I like these bottles since they are 24oz and super cheap for 4. You might think a smaller 8oz bottle would be fine, but you will end up constantly refilling it, because hose connections is definitely something where it is better to overspray than underspray because you are worried you might run out.