Netafim Check Valve Blue Pin for Fogger and Mister Lines
The Netafim check valve blue pin opens at 22 psi. It holds the line shut until pressure builds, then snaps every nozzle on together for even fog. When the cycle ends it closes and stops drip-down onto the canopy below. The blue pin marks the 22 psi rating, versus the purple pin fitting rated 28 psi. Each bag holds 25 valves.
Adding an Anti-Drain Check Valve to CoolNet Foggers
This is the fix for a fogger head that drips after lights-out or starts unevenly across a bench. Growers fit one between the hanging assembly and the nozzle, so the line has to hit 22 psi before any fog starts. That threshold clears the weak dribble that leaves wet and dry spots across a bench. Blue suits systems around 22 psi. Higher-pressure runs use the purple pin.
Key Features
- 22 psi opening: Holds until pressure builds, then all nozzles start together.
- Anti-drain closure: Stops post-shutoff drip onto the canopy below.
- Blue pin code: Flags the 22 psi rating apart from the 28 psi purple valve.
- Fits foggers and misters: Adds check-valve action to CoolNet, SpinNet, and hanging heads.
- 25 per bag: Enough to retrofit a full fog or mist grid.
Technical Specifications
| Specification | Value |
|---|---|
| Model | 0340020-B |
| Type | Anti-drain (LPD) check valve |
| Pin Color | Blue |
| Opening Pressure | 22 psi |
| Fits | CoolNet foggers, misters, hanging sprinklers |
| Pack Size | 25 |