Air Fittings, Compression / Push to Connect

[Fratto]

I have a few air fittings in the auxiliary air systems that need to be replaced. I went to Prevost to buy some and they said to use compression fittings from the hardware store. DOT approved push to connect fittings are not that expensive and would seem to be easier to use.

Any thoughts on using one or the other?

[Fratto]

Also for the tubing to accessories like the belt tensioning mini bags, etc. should we be using DOT approved tubing or can we use any industrial tubing with the proper pressure rating?

[Gil_J]

DoT fittings and hose is only required on the braking system. A catastrophic failure on the aux side can't totally deplete the braking air. this is the primary function of the protection valve.

With that said, why not use all DoT stuff? The cost is about the same and your spares will all be the same.

[Fratto]

Thanks Gil. That is what I was thinking. Any thoughts on compression vs push to connect fittings? I am leaning toward the DOT push to connect ... that may have been part of what you were saying above... I was just surprised that the Prevost parts tech in Fort Worth suggested the hardware store compression fittings.

Thanks again.

[Gil_J]

Compression fittings are cheaper and less susceptible to leaking over time from hoses that place a strain on the connector. Make sure you use a tubing insert. All DoT fittings for plastic tubing will come with them.

[Fratto]

Awesome. Thanks Gil.