Replacing gas regulator and hoses

I've read that regulators go bad over time and should be relaced. Is that true?

At some point, I am guessing the regulator was hard plumbed in to the outlet and then whoever changed it went to this set up which isn't ideal.

Solving for the regulator first solves the rest. Plumb it into the main line and then run a rubber line with a BBQ type screw on connector?

Is there a definite pressure that RVs are supposed to use?

Looks like the regulator has a fitting to connect to the cylinder direct so it sticks out too far.

You can just replace that fitting with a rubber pigtail. Any propane dealer can set you up. I can't tell what the threaded fitting size is on the regulator to give a specific suggestion.

Probably 1/4" pipe thread, hard to tell.

Maybe this one: https://www.rvplus.com/cavagna-lp-pigtail-15-acme-w-hangtag-50-a-190-0033.html

Most RV' s use a lower pressure regulator than a bbq grill . Get the right one . They are also usually mounted to the wall with the fixable hose going from regulator to tank . You should be able to close the door without disconnecting .

I'd just go and get a replacement grill regulator and install it. A little bit of soapy water in a spray bottle, or even a shot of windex, on the connector to make sure it's not leaking.

What you've got there is a dual stage regulator if I'm not mistaken. Does not appear to be original to the camper, as you should be able to leave it hooked up to run the fridge during travel.

Agreed a pic would help. Mine has 2 20 lb tanks laying down with the regulator hanging in between. In my rebuild I replaced the regulator with a Marshall auto changeover along with new hoses too. I've only got one battery but two gas tanks so I run what I can with them.

You should be able to at least close the hatch on your cylinder, but you need to be sure it's properly vented because regulators are vented and do expel gas from time to time. Propane is heavier than air and will blow if it accumulates in low places.

Can you post a picture of what you are talking about? It would be helpful for people to see what you are dealing with in order to make suggestions.

Most likely your current setup is some cobbled-together mess from a previous owner, which would explain why you can't close the door with it hooked up. Or maybe you just need to turn the tank 90 degrees?

In my original setup there were two 20lb grill tanks sitting upright and a changeover valve hung between them. The hoses were cracked and I barely use a tank of propane in a season, so I replaced the whole works with a simple grill regulator. Works fine. Probably won't flow enough propane if I ran the water heater, furnace, and stovetop simultaneously, but I would never do that.

You need a regulator that is rated for whatever BTUs you expect to need. The furnace, stovetop, and water heater are all rated in BTUs. Add up what you think you'll be running at one time and get a regulator at least rated for that if not more.