I believe the top one is a tank flush connection. ( per decal to right)
Top one looks like black tank flush.
Two times this summer, someone next to me hooked up their black water inlet instead of city water, then went to the lake.
The first time, I heard about it as they came back to a trailer full of black water. I couldn’t believe it.
The second time, I saw water coming out of their door, realized it had happened again, ran over and shut off their water and informed them of the bad news when they came back.
These black water flushes need to be a different color or something. Mounted in a less accessible/obvious spot?
They were both rentals by the way.
I’d suggest taking a picture with more of the RV shown because I’m not sure that sticker to the right applies to those inlets or something to the right we can’t see.
Generally, you’ll have 3 inlets close to each other:
Fresh Water *TANK* Fill
Fresh Water CITY/HOSE fill
Black Tank Flush
ones to fill the freshwater tank. the other (bottom) is for when you are connected to running water and dont wanna bother with pumping and tanks and such…
Top is for cleaning your poop/black tank.. DO NOT HOOK A CLEAN/SANITIZED FRESH WATER HOSE TO THIS, YOU CAN BACK FLOW POOP IN TO YOUR FRESHWATER HOSE.
Bottom is standard city water.
Don’t hook to the top and turn on unless your valve is open. Can be a crucial mistake thinking you’re just hooking up to city when thats your flush.
Source: Why does my friends camper have two city water connections?
