San T flush check valve/ V breaker

[Jerry Emert]

The check valve and vacuum breaker are under the sink in the bathroom. Mine leaked water when I tried to flush. I have both the check valve and the breaker to replace them. I took a pic of the original in place. Pic disappeared off my phone.  What I need to know is which one of the lines is input and what one is output. Info or a pic of the valve, showing the color of the pex lines, would be greatly appreciated. I’m hoping Beaver had a standard color that they used. 
2003 PT.

[Robert Lawrence]

I can take a picture of mine tomorrow night. .  I think the input line was the one closest one to the outside wall.

[Jerry Emert]

Thank you. I can work with that. Pic still appreciated if not too much trouble.
Thanks again.

[Fred Brooks]

   Jerry, I am pretty sure there is an arrow on the vacuum breaker indicating water flow direction. If not, take a quick picture with your phone and then disconnect the 2 water lines and momentarily turn the water pump on and off. The water direction always goes towards the vacuum breaker and then to the waste tank. Fred

[Jerry Emert]

I know what the flow direction through the breaker is. Just don’t know whether the water is going to come from the blue pex or the red. I took a pic before I took it apart but the iCloud fairy decided to remove it on me.
Thanks

[Eric Maclean]

Jerry
I'm not sure I would rely on a picture from someone else's coach for as they say these coaches are like snow flakes no two are the same depending on the installer of the day.
To check with the vacuum breaker removed
If you use light air pressure ( don't pressurize the lines above 50 psi ) with a blow gun the pex going to the black tank (saniflush scrubber) should free flow air and the pex going to the saniflush connection at your water bay should not free flow as it has a check valve installed.

After installing the new vacuum breaker keep an eye on it these things have a habit of leaking

Hope this helps
Eric

[Jerry Emert]

Thanks, as I said I'm hoping they are there is a standard connection.  The check valve is connected to the breaker and came out with it.  You did give me an idea though.  I should be able to connect air from my compressor to each side under the sink and see where the air comes out.