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Drain Rods
Drain rods are plumbing equipment used to attempt to unblock drains and sewers. The set normally consists of several stiff, but flexible, rods, each approximately one meter long, which may be screwed together end-to-end. The material is often polypropylene heavy gauge tubing. Jointing of the plastic to metal is done in hydraulic presses and these joints are the achilles heel of this rod type. Often, when subjected to force, the joint breaks. Better quality ends have securing pins through the differing materials. More expensive rods are high tensile steel. End connections are often brass or steel, the better steel type having cadmium plating for corrosion resistance. Two types of threaded end can be purchased. Cheaper ones simply screw together, male to female but have the disadvantage of needing one-way rotation in use to prevent unscrewing. Better quality rods have their ends formed into a square peg, mating in a matching square hole in the adjacent rod
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Plumbing
Plumbing
Plumbing
is any system that conveys fluids for a wide range of applications
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Drain (plumbing)
A drain is the primary vessel or conduit for unwanted water or waste liquids to be flumed away, either to a more useful area, funnelled into a receptacle, or run into sewers or stormwater mains as waste discharge to be released or processed.Contents1 Drain design, Drain installation and Drain maintenance 2 Safety2.1 Waste versus re-circulated drains 2.2 Multiple drains 2.3 Legislation3 See also 4 ReferencesDrain design, Drain installation and Drain maintenance[edit] Drain design and installation parameters are engineered to ensure drain functionality for its intended purpose, allowing for variances in volume, matter to be conveyed and maintenance requirements. Drain installation takes into account principles related to gravity, vacuum, grade, human exposure safety to biological agents and resistance to functional failure
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Effluent Sewer
Effluent sewer
Effluent sewer
systems, also called septic tank effluent drainage (STED) or solids-free sewer (SFS) systems, have septic tanks that collect sewage from residences and businesses, and the effluent that comes out of the tank is sent to either a centralized sewage treatment plant or a distributed treatment system for further treatment. Most of the solids are removed by the septic tanks, so the treatment plant can be much smaller than a typical plant
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Polypropylene
0.946 g/cm3, crystallineMelting point 130 to 171 °C (266 to 340 °F; 403 to 444 K)Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Y verify (what is YN ?)Infobox references Polypropylene
Polypropylene
(PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. An addition polymer made from the monomer propylene, it can be produced in a variety of structures giving rise to applications including packaging and labeling, textiles, plastic parts and reusable containers of various types, laboratory equipment, automotive components, and medical devices
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Hydraulic Press
A hydraulic press is a device (see machine press) using a hydraulic cylinder to generate a compressive force. It uses the hydraulic equivalent of a mechanical lever, and was also known as a Bramah press after the inventor, Joseph Bramah, of England.[1] He invented and was issued a patent on this press in 1795. As Bramah (who is also known for his development of the flush toilet) installed toilets, he studied the existing literature on the motion of fluids and put this knowledge into the development of the press.[2]Contents1 Principle 2 Application 3 In popular culture 4 ReferencesPrinciple[edit] The hydraulic press depends on Pascal's principle-the pressure throughout a closed system is constant. One part of the system is a piston acting as a pump, with a modest mechanical force acting on a small cross-sectional area; the other part is a piston with a larger area which generates a correspondingly large mechanical force
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Achilles Heel
An Achilles' heel
Achilles' heel
is a weakness in spite of overall strength, which can lead to downfall. While the mythological origin refers to a physical vulnerability, idiomatic references to other attributes or qualities that can lead to downfall are common.Contents1 Origin 2 Anatomy 3 See also 4 ReferencesOrigin[edit]Oil painting (c. 1625) by Peter Paul Rubens
Peter Paul Rubens
of the goddess Thetis dipping her son Achilles
Achilles
in the River Styx, which runs through Hades. In the background, the ferryman Charon rows the dead across the river in his boat.In Greek mythology, when Achilles
Achilles
was a baby, it was foretold that he would die young
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Steel
Steel
Steel
is an alloy of iron and carbon and other elements. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons. Iron
Iron
is the base metal of steel. Iron
Iron
is able to take on two crystalline forms (allotropic forms), body centered cubic (BCC) and face centered cubic (FCC), depending on its temperature. In the body-centred cubic arrangement, there is an iron atom in the centre of each cube, and in the face-centred cubic, there is one at the center of each of the six faces of the cube
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Brass
Brass
Brass
is a metallic alloy that is made of copper and zinc. The proportions of zinc and copper can vary to create different types of brass alloys with varying mechanical and electrical properties.[1] It is a substitutional alloy: atoms of the two constituents may replace each other within the same crystal structure. In contrast, bronze is an alloy of copper and tin.[2] Both bronze and brass may include small proportions of a range of other elements including arsenic, lead, phosphorus, aluminium, manganese, and silicon
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Cadmium
Cadmium
Cadmium
is a chemical element with symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, namely zinc and mercury. Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. Cadmium
Cadmium
and its congeners in group 12 are often not considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in Earth's crust
Earth's crust
is between 0.1 and 0.5 parts per million (ppm). It was discovered in 1817 simultaneously by Stromeyer and Hermann, both in Germany, as an impurity in zinc carbonate. Cadmium
Cadmium
occurs as a minor component in most zinc ores and is a byproduct of zinc production
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Auger (drill)
An auger is a drilling device, or drill bit, that usually includes a rotating helical screw blade called a "flighting" to act as a screw conveyor to remove the drilled out material. The rotation of the blade causes the material to move out of the hole being drilled.Contents1 Types 2 Gallery 3 See also 4 References 5 External linksTypes[edit]Auger (drill), 1849An auger used for digging post holes is called an earth auger, handheld power earth drill, soil auger, or mechanized post hole digger. This kind of auger can be a manually turned, handheld device, or powered by an electric motor or internal-combustion engine, possibly attached to a tractor (being provided with power by the tractor engine's power take-off as shown). Handheld augers can also be used for making holes for garden planting. Wood augers have a screw to pull them into the wood, as a gimlet has, and a cutting lip that slices out the bottom of the hole
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Double Helix
In molecular biology, the term double helix[1] refers to the structure formed by double-stranded molecules of nucleic acids such as DNA. The double helical structure of a nucleic acid complex arises as a consequence of its secondary structure, and is a fundamental component in determining its tertiary structure. The term entered popular culture with the publication in 1968 of The Double Helix: A Personal Account of the Discovery of the Structure of DNA,by James Watson The DNA
DNA
double helix polymer of nucleic acid, held together by nucleotides which base pair together.[2] In B-DNA, the most common double helical structure found in nature, the double helix is right-handed with about 10–10.5 base pairs per turn.[3] The double helix structure of DNA
DNA
contains a major groove and minor groove
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Special
Special
Special
or specials may refer to:Contents1 Music 2 Film and television 3 Other uses 4 See alsoMusic[edit] Special
Special
(album), a 1992
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Plumber's Snake
A plumber's snake is a slender, flexible auger used to dislodge clogs in plumbing. The plumber's snake is often reserved for difficult clogs that cannot be loosened with a plunger. It is also sometimes called a toilet jack.Contents1 Auger varieties1.1 Hand auger / hand spinner 1.2 Closet auger / toilet auger 1.3 Drum augers 1.4 Roto-Rooter2 See also 3 External linksAuger varieties[edit] Plumber's snakes have a coiled (helix-shaped) metal wire with a broader gap between the coils at the terminal end. The operator turns a crank to rotate the helix as it moves through the pipe. If the clog is caused by a dense, but shreddable obstacle, such as tree roots or glass wool, the auger might break it up enough to enable flow. A small, lightweight obstruction might be snagged or corkscrewed by the auger, enabling the operator to pull it away
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Drain Rods
Drain rods are plumbing equipment used to attempt to unblock drains and sewers. The set normally consists of several stiff, but flexible, rods, each approximately one meter long, which may be screwed together end-to-end. The material is often polypropylene heavy gauge tubing. Jointing of the plastic to metal is done in hydraulic presses and these joints are the achilles heel of this rod type. Often, when subjected to force, the joint breaks. Better quality ends have securing pins through the differing materials. More expensive rods are high tensile steel. End connections are often brass or steel, the better steel type having cadmium plating for corrosion resistance. Two types of threaded end can be purchased. Cheaper ones simply screw together, male to female but have the disadvantage of needing one-way rotation in use to prevent unscrewing. Better quality rods have their ends formed into a square peg, mating in a matching square hole in the adjacent rod
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