Tow Pro: Gas Regulator on Van

I found my gas regulator was not working.I replaced with one from a bbq.The stove works ok but i haven't tried the fridge.I noticed the old regulator was a little bit different.D o I need a special one?I think the flexible hose may have came apart inside & gone into the regulator & blocked it. Iwill be going to copper lines.Anyone else find this problem with a regulator?

Red Hindmarsh, NSW