Okay to install airbags on 5th wheel suspension?

Contrary to popular belief, airbags WILL lift most anything. That is why Fire departments use them to lift things fir rescue. In the case of adding them to a existing suspension, the thing to remember is by the time you have lifted the load an inch or two, you have (nearly) completely unloaded the existing springs, and the airbags are supporting the entire load. Any movement at all and the original springs come back into play - the perceived "firm up" people attribute to the airbags.
Just slapping a set onto your existing suspension will not get you what you want.

I would raise the trailer the correct/recommended way with a sub frame between the spring hangers and bottom of the main frame rails.

Std leaf springs on a trailer are only about 26"-28" long and ride stiff. Now add air bags and the suspension will be even stiffer and probably won't raise the trailer.

I would contact your axle mfg with your question.

How tall is the 5th now? You may be as tall as you can safely be and maintain overhead clearance. What is your 5th?

ScottG wrote:
Air bags aren't real good for lifting. They lift a little OK but if you try to get very much out of them it makes the ride rock hard.
I'd either flip the axles or have a spacer installed between the leaf mounts and the frame.

Good point that bags don't lift, they just "firm up" the ride.
I just installed AirPac bags on my 3/4 ton last week and the rear bumper was raised only 1" when inflated to the max (90 psi) but it sure gives a rock hard ride at that pressure.

Air bags aren't real good for lifting. They lift a little OK but if you try to get very much out of them it makes the ride rock hard.
I'd either flip the axles or have a spacer installed between the leaf mounts and the frame.

Moved from Forum Technical Support

First off, welcome.
Next, you need to be aware of which forums you are posting in. This is definitely in the wrong forum. But I have asked the moderator to move it for you.
As to getting the trailer higher in the air? and that after all is your question.First choice is what is called flipping the axles. Which involves welding new spring perches in top of the axles and installing new ubolts with the springs on top. Next in order is moving the springs down one or two holes in the hangers. If your trailer is so equipped.
The problem with adding air bags as I see it is, you would place undo stress on the rest of the components. I think I would look at the first two options, then consider new spring packs with a bit more arch to gain some height.
Remember now, towing nose high by an inch or so is not as big of a deal as you might think. Now, towing 6 inches nose high, yea that is a problem.