Dorman 926-534 Vacuum Check Valve

Dorman 926-534 Vacuum Check Valve

Dorman 926-534 is a vacuum check valve built to match the fit and function of the original valve on specified vehicles. It uses a black plastic body with a round connector shape and three ports for direct replacement service on vacuum system applications.

Key Features

• Direct-fit vacuum check valve for emission control and vacuum system service
• Plastic construction with a black finish
• Round connector shape with three ports
• Compact design: 2 in. length and 0.269 in. maximum diameter
• Port outside diameters: 0.24 in., 0.169 in., and 0.178 in.
• Cross-reference: Four Seasons 74808

Detailed Description

This vacuum check valve is engineered for vehicles that rely on stable vacuum routing for emissions and accessory operation. Dorman 926-534 is listed for a wide range of Ford, Lincoln, and Mercury applications, including Ford E-350 Super Duty, Ford Taurus, Ford Escort, Mercury Sable, and Lincoln Continental. It is also a fitment match for many Ford E-Series vans and trucks, including models with Integral Air Conditioning where specified. This part cross-references Four Seasons 74808 for the same application.

Use Dorman 926-534 when replacing a worn or leaking vacuum check valve on Ford E-150, Ford E-250, Ford Bronco, Ford F-150, and related vacuum system applications. The part number 926-534 is a practical OE-style replacement for maintaining proper vacuum flow direction in the system.

What It Is Used For

• Restoring one-way vacuum control in the emission control system
• Replacing a cracked, brittle, or leaking vacuum valve
• Addressing vacuum loss that can affect idle quality or accessory operation
• Correcting vacuum routing issues on Ford, Lincoln, and Mercury vehicles
• Supporting service on vehicles with Integral Air Conditioning where listed

Installation Notes and Tips

Verify port size and connector shape against the original valve before installation. Confirm the vehicle application by year, make, model, and any notes such as Integral Air Conditioning. Inspect adjacent vacuum hoses for wear, soft spots, or splits before installing the new valve to help prevent repeat vacuum leaks.

Quality Assurance

Dorman designs this vacuum check valve to match original fit and function and to provide durable, reliable performance in service. The part is built as a direct replacement for specified applications and is backed by Dorman’s product engineering standards.