A.R.I. D-025 is a reduced bore, Combination Air Valve installed on wastewater transmission systems. The Air Valve is designed to improve hydraulic operation by protecting the pipeline, increasing pipeline efficiency, and reducing energy requirements. The unique body shape of the valve, enables a continuous air gap that separates the wastewater from the sealing mechanism and helps to avoid deposits or blockage.
Size Unit
Size range
Pressure rating
Working pressure range
Working temperature
Maximum working temperature:
60° CMaximum intermittent temperature:
90° CAvailable construction materials
Reinforced Nylon, Stainless Steel
End connection type
Threaded BSP/NPT or flanged ends to meet various requested standards.
Optional add-on components
One-way Out – allows for air discharge only, prevents air intake. Non-slam – discharge-throttling attachment, allows full air intake, throttles air discharge.
A.R.I. D-025 USA
A.R.I. D-025 NS USA
A.R.I. D-025 NS STST USA
A.R.I. D-025 NS ST USA
A.R.I. D-025 SB USA
ARISENSE D-025 USA
Learn how to easily maintain your Aquestia A.R.I D-025 wastewater air valve
Animation of A.R.I. D-020, D-25 Combination Wastewater Air Valves operation
Transparent model A.R.I. D-025 Combination Air Valve for Wastewater in operation
