Pinch Valve, Solenoid 24v 3mm

Neptune Apex Trident Pinch Valve Solenoid 

If your trident is not working, chances are the tubing might be clogged, causing an internal leak, and corroded one or more of your pinch valves. 

Check the tubing for clogging first. 

Then this might be what you need to get your trident back to working.