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A trap primer (or trap seal primer) is a plumbing device or valve that adds water to traps.The water seals in traps are needed to prevent sewer gases from entering buildings, but because this water is exposed to the air, it is subject to evaporation over time in infrequently used floor drains, leading to the release of sewer gas into the environment.
The Information field contains the PPP payload; it has a variable length with a negotiated maximum called the Maximum Transmission Unit. By default, the maximum is 1500 octets . It might be padded on transmission; if the information for a particular protocol can be padded, that protocol must allow information to be distinguished from padding.
Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.
A process flow diagram (PFD) is a diagram commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment. The PFD displays the relationship between major equipment of a plant facility and does not show minor details such as piping details and designations.
The Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol for encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames. It appeared in 1999, in the context of the boom of DSL as the solution for tunneling packets over the DSL connection to the ISP's IP network, and from there to the rest of the Internet.
The Buchan trap was devised in the 19th century to stop the flow of sewer gases due to the miasma theory of disease. [1] For example, it was believed that the disease cholera was an airborne infection, not waterborne. The Buchan trap is normally found in the bottom of manholes or drop-shafts.
A 10-outlet rack-mount PDU (front), connected to a UPS (bottom unit on right) A temporary PDU, distributing 120 volt AC power at an outdoor event Cabinet PDU with access doors open A power distribution unit ( PDU ) is a device fitted with multiple outputs designed to distribute electric power, especially to racks of computers and networking ...
A Public–private partnership unit (PPP unit) is an organisation responsible for promoting, facilitating and/or assessing Public-private partnerships (PPP, P3, 3P) in their territory. PPP units can be government agencies, or semi-independent organizations created with full or partial government support.