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[1] [2] These fittings are used in plumbing to manipulate the conveyance of fluids such as water for potatory, irrigational, sanitary, and refrigerative purposes, gas, petroleum, liquid waste, or any other liquid or gaseous substances required in domestic or commercial environments, within a system of pipes or tubes, connected by various ...
A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.
These sizing schemes allow for universal adaptation of transitional fittings. For instance, 1/2" PeX tubing is the same size as 1/2" copper tubing. 1/2" PVC on the other hand is not the same size as 1/2" tubing, and therefore requires either a threaded male or female adapter to connect them.
Plumbing work is defined in the Australian Standards (AS3500) Regulations 2013 and refers to any operation, work or process in connection with installation, removal, demolition, replacement, alteration, maintenance or repair to the system of pipes and fixtures that conveys clean water into and liquid waste out of a building.
Some widely used standards for plumbing fittings and accessories located between the supply stop and the terminal fitting area are: A112.18.1 Plumbing Supply Fittings Standard, American Society of Mechanical Engineers; A112.18.2 Plumbing Waste Fittings Standard, American Society of Mechanical Engineers
Type K 1 ⁄ 2 inch, type L 1 ⁄ 2 inch, and type D 5 ⁄ 8 inch ACR all have the same outside diameter of 5 ⁄ 8 inch. In both the U.S. and Canada, copper pipe and fittings are sold in imperial units only as metric sizes are not manufactured for use in North America. [6]