White hose and black tank flush?

For convenience I leave my freshwater hose hooked to the rig freshwater connection. I have a blue curled hose I leave connected to the blackwater flush. Then a y at the city water connection. Saves switching hoses all the time. When time to flush I hook up blue hose flush then unhook blue hose.
I use different colors to distinguish which hose is which. Color of hoses is not import could be purple and gold.
As long as there is positive pressure into the tank flusher there should be no cross contamination.

ChooChooMan74 wrote:
My flush has a built in anti-siphon. Some people just like peace of mind. Yeah, probably nearly impossible for sewage to back up through the safety devices and into the hose.

" Impossible " you say? You've never heard of a check valve leak or fails?

Don't you rinse off your septic drain hose before storing? Most do, and it certainly makes sense to never get your white hose near that. I've seen people use their fresh water hose to rinse off the septic drain hoses and area...sticking the end right into the drains,.... YUCK.

The back flow preventer is more than a check valve it is OPEN to atmosphere because it is a vacuum breaker designed to prevent any siphoning from waste tank back into water supply system.

SO YES it would be a strong robust germ to get from waste tank across air gap thru back flow and contaminate your potable water hose



Here is a clear one (most are black) so you can see inside.....Cap is open to atmosphere


I have a potable water hose for city water connection and for filling my fresh water tank.......because that hose will not leach into the water and make it taste funny. I don't care but GF does so I use it.

I also have a garden hose for for black tank flush connection, for washing 5vr, for general hose down

Both hoses are connected to water supply via a 'WYE' connector. I sometimes will even get a drink from that garden hose while outside washing 5vr cause I am thirsty. Course some folks will probably have a fit but I've had dirtier/nastier water in my mouth growing up, in the NAVY, working on oil rigs etc.

My flush has a built in anti-siphon. Some people just like peace of mind. Yeah, probably nearly impossible for sewage to back up through the safety devices and into the hose.

My thoughts are the same as yours. We have not been sick yet.