What is it?

[alaskaforby4]

Hello,

I have a 89 KW T600 and coming off the air tank it has these dodads?
They screw into the tank and then a airline goes into them on nearly every fitting.
Im guessing it is some sort of regulator, check valve or something. I am looking for
the correct name so I can look it up. As one has began to leak
Thanks!

 

[alaskaforby4]

Another Picture, Different truck

 

[alaskaforby4]

Found it, Pressure Protection Valve...Should have searched a little harder before posting!

 

[Junkyard]

You got it. Keeps whatever accessory is plumbed after it from draining all the air if it malfunctions.

 

[kshansen]

For future reference check this site:

http://www.bendixvrc.com/eCatalog/B...9B5776B72811D0F9D5767E24E80/BW1114_US_009.pdf