(1.5in DN40)Air Vacuum Relief Valve Exhaust Vent Valve For Agricultural Garde FI
Style: 1.5in DN40, 2in DN50(Optional). 1.5in DN40 Size: Approx.18.5x13cm / 7.3x5.1in. It is installed at a relatively high point of the piping system. When the system is started, the air in the piping system is exhausted.