L1‑29 Hand Valve 4"5" Trumpet Port Brass Manual Valve for Bus Air‑Conditioner

L1‑29 brass hand valve is manual cut‑off valve specially for bus and coach air‑conditioning refrigeration pipelines. Comes with 4 inch and 5 inch trumpet flare port connection, perfectly match bus AC refrigeration tubing. Equipped with red plastic rotary hand knob for easy manual open‑close operation. Solid brass valve body offers excellent pressure resistance and anti‑corrosion performance, stable sealing performance under refrigerant working pressure. Fixed mounting foot for firm installation. Widely used for refrigerant flow control and pipeline maintenance shut‑off on various bus air‑conditioning systems.