Prevents loss of tractor brakes in case of trailer
breakaway or loss of air pressure. Automatically closes off lines and vents
trailer side supply between 20 to 45 psi. |
Part Number |
Supply In Port
(NPT) |
Supply Out Port
(NPT) |
Control In Port
(NPT) |
Control Out Port (NPT) |
7700 |
1/4" |
1/2" |
1/4" |
1\2" |
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