Vacuum Transmitting Valve (VTV) - Federal
Check VTV by blowing air into each side. Verify air flows without resistance from side B to side A. Air should flow with difficulty from side A to side B. If problem is found, replace valve.
Check VTV by blowing air into each side. Verify air flows without resistance from side B to side A. Air should flow with difficulty from side A to side B. If problem is found, replace valve.