ANTI-RETURN valve, SOLUTION at the AIR inlet in the FUEL circuit

Check Valve in Fuel tank

Non-Return Valves

This inlet/outlet anti-siphon, female-threaded valve offers reliable electric backflow prevention. It has a convenient 6-bolt bonnet constructed from highly durable, glass-reinforced nylon. The rugged diaphragm ensures leak-free performance.

Hunter 3/4 PGV-ASV Anti-Siphon Valve

EVIL ENERGY 3/8 Fuel Check Valve One Way Inline Non Return Diesel Gasoline Silver(10mm OD,2PCS) : Automotive

Dorman OE Solutions 3/8 Inch Fuel Check Valves 800196

VPAS8, Anti-Siphon Valves Kit (3/8″ SAE)

Dorman OE Solutions Water Separator Valve 904202

Inlet Check Valve Replacement Installation by Dorman Products

PCV/Crankcase Ventilation on Supercharged Engine

Overflow Valve to Adust your Bosch P7100 Injection Pump

Processes, Free Full-Text

A Comprehensive Guide on Water Check Valves

Oil Piping Check Valves - Non Return Valves: What are the uses, locations, prohibitions & codes for the use of check valves in oil piping systems

Tigerstop™ Anti-Siphon Valve, S224-2