Chelsea Pressure Control Valve - 1/4"- 1/8" - #378414

Chelsea 378414 – Pressure Protection Valve for Heavy-Duty Air Brake Systems - 1/4" In 1/8" Out

MPN: #378414 | VMRS: #056001086 | WCI #118365

Your air brakes are non-negotiable — and the Chelsea 378414 1/4" Pressure Protection Valve is the safeguard that keeps them working when something else in the system fails. Designed specifically for heavy-duty commercial truck air brake systems, this valve automatically isolates secondary circuits to protect critical brake pressure in the event of a downstream failure.

The Chelsea 378414 maintains a holdback pressure of 65–75 PSI, ensuring your primary brake functions stay fully operational even when another air circuit loses pressure. It's a small part with a big job — and one that DOT inspectors will be looking for.

Built for commercial truck reliability:

• Protects brake system integrity during air circuit failures

• Maintains 65–75 PSI minimum holdback pressure to keep brakes operational

• 1/4" port size for straightforward installation on most heavy-duty applications

• A must-have for DOT compliance and annual brake system inspections

• Direct replacement for worn or leaking pressure protection valves

Don't wait for a roadside inspection or a brake failure to find out your protection valve is bad. Keep a Chelsea 378414 on hand — it's one of the most important safety valves on your truck.

Min. Holdback Pressure: 65-75 PSI