Originally Posted by Frederick L. Simson
I think what you're actually getting is a lot of air which is causing the splashing. It becomes normal when all of the air in the line has been pushed out and replaced with just water.
When hooking up to City Water, I crack a sink faucet in the trailer open BEFORE connecting the white hose. Then I open the campground faucet s-l-o-w-l-y (just a crack at first) to push the air out in a controlled way. This is even easier to do if you have an outside shower option so you don't have to run back and forth between the kitchen and the hose bibb. I close the sink faucet when all of the air is out of the line and open the hose bibb all of the way.
Exactly correct, I just open the kitchen window to control the faucet.
I have found a better way though...
Buy a pair of quick connects for your hose. When hooking up, put the male side on the trailer and the female side on the hose. You can now charge the hose at the bib, then push it half way onto the trailer. This lets the air out. when water starts to flow, simply snap it the rest of the way in place. The quick connect is also a convenient way to store the hose for transport without spillage.
BTW; I always use a pressure regulator and a filter. It is best to place the regulator first, then the filter, then the hose, this protects the maximum amount of your system.I use a filter primarily to keep my system clean, although it does have other benefits. I recently replaced my shore water inlet on my trailer with one which has a built-in regulator, it won't protect the hose, but I'll never leave it home or forget to use it.