Gauge cocks, Three-port brass gauge cocks with Teflon seals, air bleed holes and nylon handles. Designed for reliable and efficient operation as isolating valves for pressure gauges. Two options offered :Standard (GC) - Forged full brass body. Pressure : 25Kgcm2. Light Duty (GCL) - Machined full brass body. Pressure : 10Kgcm2. Each unit is individually pressure tested before dispatch. Connection Sizes : 12", 38".