One more thing:
I just looked under my trailer. The fresh water drain pipe rides on the front axle. As the axle moves up and down over bumps, it rubs the plastic tube. Mine is almost rubbed through. If I had been carrying water, and a hole developed, it would have all run out.
Last but not least, if your trailer is wired like mine, and you pull the emergency brake actuator, the wire will burn up within about 15 seconds. You won't be able to stick the spacer back into the emergency actuator because it will have melted long before that.
I found this out on a roadtrip when I lost my trailer brakes. I troubleshot down to the point where I had to know if it was the trailer or the controller.
I unhooked the emergency pin so the trailer brakes would activate, moved the truck forward, and felt the brakes on the trailer working. Before I could even turn off the truck, my father-in-law was yelling and cutting wires with dikes. The wiring was so hot the insulation was burning away and you could see how far it made it before he cut the wires.
Apparently, when the break-away switch is activated, full battery amperage is applied, the wiring fries, and you won't have brakes for very long. Not that I guess it would really matter if your trailer had seperated from your tow vehicle and was cruising down the road by itself.
That was $365 and the trailer repair shop shook their heads in disbelief that an emergency break-away switch was wired that way. The bill would have been far more if my father in law hadn't acted so quickly. This is another item I am bringing attention to the DOT/NTSB...