Product Description
| Trailer Supply (A): 3/8" Trailer Supply (B): Plugged Trailer Control: 3/8" Reservoir (A): 1/2" Reservoir (B): 3/8" Delivery (4): 3/8" PPV Closing Pressure: 70 PSI Description: Meets all FMVSS-121 trailer requirements for a spring brake control and other regulations prior to Oct. 8, 1992 to current date, Interchangeable with competitive units, Used on trailers to control both parking and emergency brake functions, Controls reservoir charging, Applies emergency (parking) brakes upon loss of trailer supply (emergency) line pressure |
