Stainless Steel and Polypropylene Air Valves

Image of stainless steel air valve
Stainless Steel Air Valve
Image of Polypropylene air valve
Polypropylene Air Valve

The three main types of Air Valves installed in water supply systems are:

Air and Vacuum Air Valves

These type of air valves discharge large quantities of air from non-pressurized pipelines and are used mainly during pipe filling. Air discharge is critical for efficiently filling pipelines with liquid. Air and Vacuum Valves also enable the intake of large quantities of air when lines are drained, when the pressure drops suddenly and at water column separation. Air intake is essential when draining lines during maintenance and for preventing pipe collapse when vacuum conditions exist. These valves operate when the line is NOT pressurized and remain closed when the line is under pressure. When pressure drops below atmospheric pressure, the valves open.

Automatic Air Valves

These type of air valves continuously release accumulated air entrapped in a pressurized line. This entrapped air is found mostly at the peaks of the pipeline. As air accumulates in the air release valve, water is displaced, the float lowers with the drop in the water level and air is released from the exposed orifice. As water refills the air release valve, the float rises and reseals the valve.

Combination Air Valves

These type of air valves fulfill the tasks required of both types - Air and Vacuum and Automatic Air Release Valves. They discharge large volumes of air when the system is being filled, admit large volumes of air during system drainage and continuously release entrapped air when the line is under pressure.


Netafim offers Air Valves in several body materials. This section highlights air valves available in either Stainless Steel or Polypropylene material. Product information for each model can be found under the 'PRODUCTS' tab.

Image of stainless steel air valve
Stainless Steel Air Valve
Image of Polypropylene air valve
Polypropylene Air Valve
Air and Vacuum Valves Body Material
Model AV010
Available Sizes: 3/4", 1"
Product Sheet
Polypropylene
Models K010STST and K014STST
Available Sizes: 2", 3", 4", 6"
Product Sheet
Stainless Steel
Model K020STST
Available Sizes: 3", 4"
Product Sheet
Stainless Steel
Combination Air Valves Body Material
Models D010STST and D015STST
Available Sizes: 2", 3", 4", 6"
Product Sheet
Stainless Steel
Model D020STST
Available Sizes: 2", 3", 4", 6"
Product Sheet
Stainless Steel
Model D023STST
Available Sizes: 3", 4"
Product Sheet
Stainless Steel
Model D025STST
Available Sizes: 2", 3", 4"
Product Sheet
Stainless Steel
Model D026STST
Available Size: 6"
Product Sheet
Stainless Steel
Model D040STST
Available Sizes: 2"
Product Sheet
Stainless Steel
Model D040PPV
Available Size: 2"
Product Sheet
Polypropylene
Models D040Long and D040LongAR
Available Size: 1/2"
Product Sheet
Polypropylene
Automatic Air Valves Body Material
Models S014STST, S015STST and S016STST
Available Size: 1"
Product Sheet
Stainless Steel