

🛑 Elevate your trailer’s brake game with precision and power!
The Sealco Service Relay Valve 4-Port RV015 110380 is a direct replacement valve engineered for tandem axle trailers with four brake chambers. Featuring four delivery ports and standardized pipe thread sizes (3/8" for control and delivery, 3/4" for reservoir), it ensures precise brake control with a nominal crack pressure of 1.5 psi for responsive activation.
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