Air Valve include : 

3A100 Series 3/2ways ; 1/8" Pipe size 

3A200 Series 3/2ways ; 1/4" Pipe size 

3A300 Series 3/2ways ; 3/8" Pipe size 

4A100 Series 5/2ways ; 1/8" Pipe size 

4A200 Series 5/2ways ; 1/4" Pipe size 

4A300 Series 5/2ways ; 3/8" Pipe size 

4A400 Series 5/2ways ; 1/2" Pipe size 

Manifold For The Air Valves