Propane Regulator Issue

[bankr63]

Last weekend I noticed a potential problem with the LPG regulator on my TT. I had switched over from primary tank to the secondary using the throw switch. I then closed and disconnected the empty tank, with the secondary pressurizing the system. However, I noticed when I pulled the tank that there was a distinct hissing (escaping gas) coming from the now disconnected hose to the regulator. At first thought it was just releasing pressure, but it continued long enough that I shut off the now primary tank as well and the hissing stopped.

Now presumably this isn't supposed to happen with the gas leaking from one branch of the regulator to the other. Anything I can do to fix the regulator, or should I just toss it and buy a new one. Note that I actually like this regulator because my pop-up indicator actually works (unlike so many others that I have read are useless).

[Fire_Instructor]

Had that happen on a previous trailer of mine, several years ago. I had to replace the regulator.