I went camping in November and used my propane heater for the first time since purchasing my 1992 Coleman Seneca. No problem. The dealer gave me a box of manuals and other crap from the previous owner. He said the previous owner purchased the regulator but never installed it. Great, simple fix. Fast forward to today. Of course I didn't fix it when I came home from camping in November. I'm going camping in 2 weeks and it would be nice to have the heater going. Its a lovely day out, I open it up, get the regulator and some tools. Everything comes apart nicely. I screw the end that goes into the propane tank, no problem. I go to screw the hose into the regulator.....problem . The new regulator has 2 ends that are 1/2 inch each (I'm not positive). The old regulator had one size that was 1/2 inch and the other 5/8 inch. This isn't going to work. So, I need to buy a new regulator. I looked online and now I'm confused. Do I need hi pressure or low pressure? Can I use one that would run a BBQ or are they rated to have a different volume of gas pass through it? or is that the difference between high and low pressure?