petcock

• Pequena válvula, torneira ou registro usado para regular a saída de ar, pressão ou líquido, comum em motores ou sistemas hidráulicos para drenagem ou ventilação.

A small valve, faucet, or cock used to regulate the release of air, pressure, or liquid, often found in engines or plumbing systems for draining or venting.

1. Small valve for draining or ventingC1formaltechnical

   A small valve or faucet used to release air, pressure, or liquid from a system, such as an engine or pipe.

   Válvula de dreno

   • The mechanic opened the petcock to drain the radiator fluid.
   • Make sure the petcock is closed before refilling the tank.
   • A stuck petcock can cause pressure buildup in the system.