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

Piping System Safeguards: Air Release Valves & Degassing Valves · Plast-O-Matic Valves, Inc.

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Gas Non-return Valves

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Oatey Sure-Vent 1-1/2 in. x 2 in. PVC Air Admittance Valve with 160 DFU Branch and 24 DFU Stack 39016 - The Home Depot

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√ Suits: 6mm (1/4) ID hose √ Easy installation and replacement √ Professional grade non-return valve - Ideal for marine, automotive, caravans/RV, and

6mm 1/4 Fuel Non Return One Way Check Valve Petrol Diesel Aluminium Alloy

INSTALL the NON-RETURN fuel valve, if it is WRONGLY installed the engine will not start.