Vaico V30-0900 Vacuum Check Valve

Vacuum Check Valve for Mercedes-Benz E-Class

The VAICO V30-0900 is a mechanical vacuum check valve built for emission control and vacuum system service. It uses a non-return valve design to help maintain one-way flow in the vacuum circuit, with compact dimensions of 61.5 mm height and 27.5 mm width/length for OE-style replacement needs.

Compatible with 1995 Mercedes-Benz E300, 1995 Mercedes-Benz E320, and 1995 Mercedes-Benz E420, this vacuum check valve is a direct-fit service part for the heater check valve application referenced by OE number 1268000078. VAICO VAICO V30-0900 is also a practical search match for 1995 Mercedes-Benz E-Class vacuum system repair and Mercedes-Benz heater check valve replacement.

Key Features

• Mechanical operating mode for straightforward vacuum control
• Non-return valve design helps maintain one-way flow
• Compact size: 61.5 mm height, 27.5 mm length, 27.5 mm width
• Lightweight construction at 0.012 kg
• OE reference application for Mercedes-Benz heater check valve service

Detailed Description

VAICO V30-0900 is a vacuum check valve used in emission control and vacuum system applications where controlled directional flow is required. The valve type is non-return, meaning it is built to allow vacuum flow in one direction while helping prevent reverse flow in the circuit. That function is important in Mercedes-Benz E300, E320, and E420 heater check valve service when the vacuum system needs stable operation.

VAICO VAICO focuses on OE-style replacement parts for European vehicles, and this part number V30-0900 aligns with the listed Mercedes-Benz application and OE No. 1268000078. It is a relevant choice for technicians and owners searching for a Mercedes-Benz E300 vacuum check valve, Mercedes-Benz E320 heater check valve, or Mercedes-Benz E420 vacuum system replacement part.

This part cross-references 126 800 00 78 and A 126 800 00 78 for the same application.

What It Helps Address

• Vacuum leakage caused by a worn or failing check valve
• Reverse vacuum flow in the heater control circuit
• Inconsistent heater valve operation on Mercedes-Benz E-Class models
• Loss of vacuum retention in emission control routing
• Driveability or HVAC control issues tied to vacuum circuit instability

Installation Notes and Tips

Verify the OE number and compare the valve dimensions before installation. Inspect connected vacuum hoses for cracks, hardening, or loose fittings, since a new check valve will not correct damaged lines. Confirm the flow direction matches the original part before final assembly.

Quality Assurance

VAICO V30-0900 is a mechanical replacement valve built to match the listed Mercedes-Benz E300, E320, and E420 applications. Its OE-reference fitment and compact construction support accurate service replacement for the vacuum system.