If they're plumbed separately and you want an onboard compressor, how do you do that?You may save $3 on running less tubing, but have to spend more than that for the T.
Do you need two compressors? Two gauges?
I would think so.
If you're gonna run them separately, don't you have to fill and empty them manually?? Not, that that's a major problem but some like the convenence of pushing a button on the dash.
When my buddy pushed the button on his dash to deflate them, it vented into the cab and stunk the place up.
He was pulling a massive fiver so I think that's a different process. Having to crawl under the nose of the RV to manually fill and ventilate the bags would kinda suck, IMO.
So, again IMHO, it seems that some applications are more gooder tied together and some aren't