This Bykski B‑DTH‑K40‑V5 Air Pressure Meter / Leak Tester is designed for quick, reliable leak checking in custom PC water‑cooling loops. It attaches to any stop‑cap point in your loop and allows you to safely pressurize the system with air before filling it with coolant. The gauge makes it easy to confirm whether your loop is sealed — a stable reading indicates the system is holding pressure properly. This tool helps prevent leaks, protects components, and gives you confidence before running your build.

Brand New – Factory Sealed.

Box is sealed by the original Bykski sticker and has never been opened. Packaging shows minor cosmetic wear from handling and storage but remains fully sealed and unused.