petcock

• Petit robinet ou vanne utilisé pour réguler la sortie d'air, de pression ou de liquide, souvent présent sur les moteurs ou les systèmes de plomberie pour purger ou vidanger.

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.

   Robinet de purge

   • 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.