304 Stainless Steel
Spunding Valves are used during the fermentation process to customize and maintain the pressure of the tank throughout. It is traditionally used for german lagers but has been used more creatively in modern brewing environments. Attach this to your blow-off arm with a tee & butterfly valve below to regulate pressure. Then, fill the plastic chamber with some sani water. The pressure can be adjusted from 0.2-2.2 Bar. Once the pressure is met, there is a blow-off in the plastic chamber.