Mounted On The Geyser Towards Often On The Opposite Side To The Drain Cock. This Is A Vital Component. This Valve Should Have A 20 Mm Metal (Copper) Pipe Connected To It And The Pipe Must Lead Directly Out The Building. This Vent An Important Safety Feature Of The Whole System. It Must Be Made Of Copper ? Not Plastic. The Pressure Rating Valve Must Match The Pressure Rating On The Geyser.
