Description
Fuel pump check valve 8 mm connection - Mercedes W114/115 W123 W201
This check valve ensures a constant fuel supply and is suitable for Mercedes models with a carburetor engine. The valve prevents fuel from flowing back into the tank when the engine is switched off.
Suitable for Mercedes models with a carburetor
• W114
• W115
• W123
• W201
Specifications
- Valve type: check valve
- Number of connections: 2
- Connection diameter: 8 millimeters
- Working pressure: 0.15 bar
- Working pressure: 2.18 psi
- Suitable for Mercedes classic car fuel systems with carburetor
- You install this valve in the return hose from the carburetor.
- Prevent fuel from flowing back into the tank
- After switching off the engine, the line remains filled.
- As a result, the mechanical or electric fuel pump has to pump out less air during the next start.
- Retention of a slight residual print
- Some systems use a return line to reduce vapor formation (vapor lock).
- A check valve can help maintain a minimum pressure in the supply line.
- Preventing the float chamber from emptying
- In certain designs, fuel can escape through the return side, causing the float chamber to empty faster.
- A check valve can counteract this and reduce warm start problems.
- Controlling the direction of flow
- In systems with a fuel reservoir (swirl pot), damper, or special pressure regulator, fuel must flow in only one direction.
- The check valve prevents unwanted circulation.
Always check before purchase and installation whether the part is suitable and equivalent based on photos, description, and specifications; installed or used parts cannot be returned.









