The A.R.I Underground SB Air Valve models are available in various vault sizes, ranging between 615mm-2440mm (2ft-8 ft). This enables installation below permafrost levels, protecting the air valve from freezing conditions.
The A.R.I Underground SB Air Valve models are available in various vault sizes, ranging between 615mm-2440mm (2ft-8 ft). This enables installation below permafrost levels, protecting the air valve from freezing conditions.
