Planning to make outdoor shower with 55 gallon barrel

How many people will be taking a shower? 55gal is a lot of water.

If you are going to fill it daily, you probably need some supplemental heating, particularly outside of the heat of summer. A small pump running it thru a black hose would do the trick.

Also, is this at a campground or other place where the health inspector may stop by? A friend just had to remove the outdoor shower he built because the inspector came by and said it didn't meet code (silly but the campground still had to tell him to remove it)