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.
Definition of backflow preventer. A backflow preventer is a check valve installed on potable water supply piping to prevent possible contamination of the water supply system by backflowing but contaminated water from the building into the outside public water supply mains.