The RhinoEXTREME RV Sewer Hose w Swivel Fittings # CAM39861 referenced in your question is both black and orange in color.
This is a 15 foot long sewer hose that includes a swivel bayonet and elbow fittings, a 4-in-1 adapter, locking rings, and storage caps. The 3 inch diameter hose will fit all standard sewer hose fittings. I have attached a short video demonstration on this product that you can also check out. view full answer...
Your concerns about the durability of a sewer hose are completely understandable. The RhinoEXTREME RV Sewer Hose # CAM39861 is made out thermoplastic, which is designed with durability in mind. It is also reinforced with what is called a polypropylene exo-skeleton; this is essentially a wiring on the outside that allows the hose to keep its shape.
I've added links to video reviews of this hose for you to take a look at. view full answer...
Both the Camco RhinoEXTREME RV Sewer Hose # CAM39867 and # CAM39863 referenced in your question are completely black in color without any orange.
I have attached short demonstration videos on both of the products so you can see exactly how they look. view full answer...
The RhinoFLEX RV Sewer Hose in the Kit # CAM39768 that you referenced is made of heavy-duty polyolefin and has a carbon steel wire lining.
The polyolefin resists pinholes and leaks that can be caused from natural wear-and-tear, while the carbon steel wiring will allow the hose to retain its shape. view full answer...
The two threads you pointed out on the MB Sturgis Sturgi-Stay T-Fitting for Type 1 Valve # 103612-MBS are on the outside a Type 1, ACME fitting and on the inside a POL fitting.
A POL fitting is commonly found on the ASME tank used on motorized RVs to connect the propane tank valve to the RV regulator. Before the introduction of Type 1 fittings, POL fittings were the standard fitting for all propane tanks. Now, both types of fittings are featured on DOT cylinders. The POL fittings are... view full answer...