Ensure your trailer's braking system is functioning properly with the SR5 Trailer Spring Brake Valve, a high-quality replacement for part number K033221. This valve plays a crucial role in controlling the application and release of the spring brakes, ensuring safe and efficient braking operation. Replaces: 119471001, BW065437, K033086, K033221BXW, R955065437, R955065437N, R955109615N, 065437, 65437, K033221, 109615X, 65437RX, 65437X, OTR065437, 65437N, H-30176, 065437P, 102831, 109419, 109615, 109615X, 119471001, 170.065437, 170065437, 34035, 5002563, 5002564, 65437, 65437X, 745K033221, AV065437, BW-065437, BX065437, E-BN065437N, K033080, K033086, K033221, OR109615, OR109615X, S-A142, SA142, WA65437