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Can anyone tell me if a fault in the shut off valve as per the picture below. I removed a part from it but I believe I placed it the wrong way round. I can't remove this part now and I think I will need to replace the whole valve.
http://q2autogaz.pl/zawor-gazowy-lpg-lovato-p-51.html
Also can someone advice where I might be able to obtain a manual for servicing LPG installations. Further to this, what precautions should be taken when changing this shut-off valve with a live gas system?
Thanks
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