Elapsed time required to reduce the pressure in all service chambers from 95 psi to 5 psi as per US Regulations FMVSS 121 (49CFR 571.121).
Service Brake Release Time
![](https://sealcocvp.com/wp-content/uploads/2023/11/Service-Brake-Time-release-pic-768x134.jpg)
Elapsed time required to reduce the pressure in all service chambers from 95 psi to 5 psi as per US Regulations FMVSS 121 (49CFR 571.121).