... Pressure: 10k, 16k Type: A, AS, B, BS, C, CS, D, DS, E, ES Air Vent HeadAir Vent ... Head can be used on water tank and oil tank.Size: 50A-500APressure: 10k ... , 16kType: A, AS, B, BS, C, CS, D, DS, E, ES, FBody Material: Cast iron ... head has character of cover on top of head.Water Tank Air Vent head has character of permeability on two side of heads. It ...