Waterway Plastics 0.5" Neoperl Check Valve / Automatic Air Venturi Valve

Waterway 1/2"  Neoperl Check Valve / Automatic air venturi

15mm / 0.5" socket
20mm / 0.75" spigot

one way spring loaded check valve.
Intake through open end with foam insert.

Uses:
1. 'Under spa' automatic air venturi control valve - spa brands such as Dimension One Spas have used similar devices.
2. Air inlet check valve for suction fittings with safety air break ports.

If installed below water level the check valve will prevent leaks.