I am installing new gas pipework from my old cooker postion to the new position (a run of about 15ft), my plumber will then do the final connections & test, etc. The problem is getting the pipework under the floor boards, I have 2 floor boards up for access to the floor void but dont really want to lift any more because the whole floor has been covered in hardboard & its a major operation to remove. Can anyone suggest any alternative pipe types to standard copper tube? I was thinking possibly flexible table 'y' copper but am unsure if this can be used this for gas? or a plastic pipe but agian I am unsure of which ones are suitable for gas? Any suggestions would be greatfully received!