Larger than all other newt species encountered in the UK, reaching a length of 50 â 90mm before metamorphosis. May be hard to tell apart from other newt species when they are less than 20 mm in length.
Large-scale piping system in an HVAC mechanical room. A pipefitter is a tradesperson who installs, assembles, fabricates, maintains and repairs mechanical piping systems. Pipefitters usually begin as helpers or apprentices. Journeyman pipefitters deal with industrial/commercial/marine piping and heating/cooling systems.
1. 1  a device for controlling the flow of air, as from a pipe or tank. 2  a device for controlling the flow of air in a pipe. 3  a valve for exhausting air from a fluid system, esp from a central-heating installation See also bleed valve.