I recently tried to move my gas stove out of the kithchen so I could tile. Could not unscrew the the flex hose from the gas connection- the iron pipe coming out of the floor has a shut off valve screwed to it, then an adapter, then the flex hose. I ended up cutting the flex pipe so I could move forward with the tiling. Now it is time to move the stove back in- I bought a new flex hose but still cannot disconnect the half of the flex hose attached to the valve/adapter. I am trying not to unscrew the valve, so as to not leak gas. I am using two cresent wrenches that fit well around the adapter flange and the flex hose flange. Maybe I am not tugging hard enough but it will not budge- I am assuming it is the old pipe thread compound locking the connection.. Any suggestions, and can I still reuse the valve and adapter flange if they remian in place- using new piepp thread compound to connect the new flex hose off course? I hate to pay a plumber $130 min. charge to come out and turn a wrench once, although of course then I have peace of mind.