Dewalt 1000002673 Air Compressor Check Valve

The Dewalt 1000002673 Air Compressor Check Valve is designed to prevent compressed air from flowing backward into the pump assembly after the compressor shuts off. This OEM check valve helps maintain tank pressure, supports smooth motor restarting, and protects internal compressor components from pressure-related strain.

Common Symptoms:

• Air leaks continuously after compressor shuts off.

• Compressor struggles to restart under pressure.

• Tank loses pressure while not in use.

• Hissing sound near the check valve area.

• Compressor cycles more often than normal

Compressor Leaks Air After Shutdown

Quick Check: Listen for continuous hissing near the tank fitting after the motor stops.

Fix Suggestion: Remove and inspect the 1000002673 check valve for debris, worn seals, or sticking internal components. Replace the valve if it no longer seals properly.

Prevention Tip: Drain tank moisture frequently to reduce rust and debris buildup inside the valve body.

Compressor Will Not Restart Easily

Quick Check: Check whether trapped air pressure remains in the discharge tube after shutdown.

Fix Suggestion: A failed check valve can allow pressure to push back toward the pump, increasing startup load, Replace the Dewalt check valve if the motor hums or stalls during restart attempts.

Prevention Tip: Keep intake filters clean to minimize excess pump strain and overheating.

Tank Slowly Loses Pressure Overnight

Quick Check: Fill the tank completely and monitor pressure loss while the compressor is off.

Fix Suggestion: Inspect the 1000002673 valve for internal leakage or sealing damage. Replace worn valves that fail to hold tank pressure consistently.

Prevention Tip: Periodically inspect fittings and valve connections for vibration-related loosening.

Hissing Noise Around Valve Connection

Quick Check: Apply soapy water around the check valve threads and fittings to identify leaks.

Fix Suggestion: Tighten fittings carefully and replace damaged thread sealant. If leakage continues, install a new OEM check valve assembly.

Prevention Tip: Avoid cross-threading brass fittings during installation.

Customer Experience: Several Dewalt compressor owners reported that replacing the 1000002673 check valve solved persistent pressure loss and nonstop hissing after shutdown. Some users also noticed easier motor startups and more stable tank pressure once the faulty valve was replaced.