This is a factory installed feature. One hose was supplied with the trailer. It fits the curbside quick connect fitting, but won't connect to the one in the front storage compartment on the driver side. Indeed I haven't found a use for them yet, but since they're part of the fresh water plumbing, I'm sure I need to get pink stuff or air to the fitting itself, to displace any residual water.
On a side note, do people put pink stuff in the black tank rinse port? Actually I think I'll just push a little air through it.
