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The horizontal drainage pipes shall be connected with the horizontal drainage pipes by oblique three-way, oblique four-way or three-way and four-way along the water. To be specific, the connection between the horizontal sewage pipes should not be made with a straight three-way or a straight four-way, but with an inclined three-way or an inclined four-way or a straight three-way or a straight four-way. These connections could ensure the normal operation and drainage effect of the drainage pipeline.

The main pipe, main pipe, and branch pipe had different definition and functions in the water supply system. The following conclusions: The main pipe referred to the pipe section from the indoor main valve (or water meter) to the water supply standpipe. It was usually in the form of a standpipe, responsible for guiding water from the water source to various locations in the building. The main water supply line was usually the main water supply line in the system and could span multiple floors. The main pipe referred to the pipe section from the water source to the most unfavorable point. The most unfavorable point could be the farthest water distribution point or the highest water distribution point. The main pipe was usually in the form of a vertical pipe or a horizontal pipe, because it must have small pipes that were divided from other pipes. These small pipes were branch pipes. The function of the main pipe was to connect the pipe section of the household pipe and the branch pipe to carry out up and down transportation. The branch pipe was a water distribution pipe on the same floor, starting from the main pipe and ending at the water distribution valve of the faucet or sanitary ware. The branch pipe was usually a horizontal pipe that connected to sanitary ware or other water points. In summary, the main pipe, the main pipe, and the branch pipe have different meanings and functions in the water supply system. The main pipe was the main water supply line, the main pipe was the pipe section that connected the household pipe and the branch pipe to transport water up and down, and the branch pipe was the water distribution pipe on the same floor.

Horizontal branch pipes and horizontal main pipes were two types of pipes in the drainage system of buildings. The horizontal branch pipe was a horizontal pipe section connecting the sewage collection device drain pipe and the vertical drainage pipe, and was used to send sewage from the sewage collection devices to the vertical drainage pipe. The horizontal branch pipe should have a certain slope to facilitate smooth drainage. The horizontal main pipe was a pipe section that connected several drainage vertical pipes to the discharge pipe, mainly to receive the drainage of the horizontal branch pipe. The connection point of the horizontal branch pipe and the horizontal main pipe has a certain distance from the bottom of the vertical drainage pipe to ensure the normal operation of the drainage system. The specific connection requirements could refer to the relevant specifications and design standards.

The difference between the UpPVP spiral pipe and the drainage pipe was that the UpPVP spiral pipe was a special type of drainage pipe with a noise reduction function. The inner wall was smooth, and the noise during drainage was low. The drainage pipe was an ordinary pipe with no noise reduction function. Therefore, the upvee spiral pipe could reduce noise during the drainage process, but the drainage pipe did not have this function.

When the horizontal drainage branch pipe is connected to the vertical pipe, different connection methods can be used. According to the Design Standard for Building Water and Waste Water, when the sanitary ware drainage pipe is vertically connected to the horizontal drainage pipe, a 90° inclined tee should be used. When the horizontal branch pipe is connected with the vertical pipe, it can adopt a three-way or four-way downstream pipe and a 45° inclined three-way or 45° inclined four-way pipe. In a special single-standpipe system, the horizontal branch pipe and the standpipe can be connected by special accessories. In addition, according to some provisions of the Building Water and Waste Design Code, when the drainage stand pipe is only equipped with a top vent pipe, the vertical distance between the lowest drainage horizontal branch pipe and the stand pipe bottom shall not be less than the specified distance. According to the Connection Design and Material Selection of Building Drainpipe Branch and Horizontal Main, when the drainage branch pipe on the upper layer of the horizontal main drainage pipe is connected to the horizontal main drainage pipe, it is recommended to use a 45° inclined tee to connect it from the top of the horizontal main drainage pipe. To sum up, when the horizontal drainage branch pipe is connected to the vertical pipe, different connection methods such as 90° inclined three-way, downstream three-way or downstream four-way, 45° inclined three-way or 45° inclined four-way can be used.

The horizontal branch drainage pipe was different from the horizontal main drainage pipe. The horizontal branch pipe was a horizontal pipe with a water point, while the horizontal main pipe did not have a water point and only had a branch pipe.

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The general plot of the novel was: The story of an otaku becoming a sage from another world. The redefined alchemy was different from the traditional classification of magic. Let's start a magical revolution in the steampunk world! Japanese fantasy, storyline... "Have you seen the Sky Tower?" "No, I haven't." "What about the sea train?" "No, I haven't." "What about the sonic airship?" "None." "These are all products of alchemy. There's nothing that alchemy can't solve!" " Listening to your bragging makes my mouth dry. Let me order takeout first." ---------------------------- Metal Rhapsody was a light novel written by the author, Xiao Zaidao Bao. It was an original fantasy novel. The general plot of this novel was: There were no navigators who explored the world, nor were there scientists who walked into nature. This ignorant Earth was about to be conquered by monsters. Ding Dong brought along the Encyclopedia of All Weapons of Human Civilization and recreated the violent aesthetics of the modern world in this backward and primitive world. Airplanes, tanks, giant ships, cannons…Ding Dong was gone forever! ---------------------------- " King of Steam " was a light novel written by the author, Yi Huan Lai Da Zai. It was an original fantasy novel. The general plot of this novel was: Gothic buildings poked out of the black haze, and a gilded carriage galloped across the stone road. Wearing a well-ironed tuxedo and a dark gold pocket watch, the young man stepped into the steel jungle of fate. The enormous airships covered the sky, and the armored trains spewed hot steam as they advanced forward! Attack! Attack! The steel flood of the human race never retreated! ---------------------------- " The Machinery Tide " was a sci-fi-doomsday crisis novel written by the author, Tie Shao. Relying on the Revival nanomachines flowing in his body to create various war machines to survive in this world that had been occupied by the bugs, and when the steel machines surrounded Zhou Can, it was the time for him to counterattack the endless swarm of bugs. ---------------------------- The book " Alchemy Frenzy " was a fantasy novel written by blue-collar Xiaoxiao Sheng. The general plot of the novel was: In my previous life, I was used to being ordinary. In this life, I want to find the most powerful and wealthy family! [I want the world to face a frenzy-Alchemy frenzy!] ---------------------------- Hollywood Production was a novel about urban life written by the author, White Thirteen. The general plot of the novel was: The new book," The Best Entertainment Era " has been released. Please support it! The general public loved him, but the film critics hated him. Duke was such a director. The blockbuster films he directed had dazzling fast editing, endless explosions and fights, and 200% visual enjoyment. They always stimulated the audience's adrenaline without limit. The film critic did not like him." Duke doesn't care about your soul! He was a sadist! I'll torture your eyes and ears like crazy!" "I worked as hard as I could, and I'm glad to see that everyone except the film critics liked the film. Then let's ignore those film critics. I make movies to make the audience like it." Duke said. This was a director who injected a dose of male hormones into all men in the world. He was known as the man who was born when the comet hit the Earth. Some loved him, some hated him, but no one could ignore him. ---------------------------- " Flames of Hell " was a sci-fi novel about interstellar civilizations written by the author. The general plot of the novel was: The latest sci-fi masterpiece by the godfather of sci-fi realism. The magical story of King Arthur, the hot-blooded legend of beast blood, and the sexy blonde beauty will bring you incredible adventures and mysterious love experiences. This is the greatest sci-fi realism masterpiece of the century in 'Hellfire'. ---------------------------- " I Can Control Metal in Marvel " was a light novel by the author, Bighead the Righteous. The plot of the novel was as follows: Tony's armor, Captain America's shield, Saul's hammer, Black Panther's widowed sister... Sorry, you forgot to take off your metal ring! Hey, Purple Potato Monster, are your gloves made of metal too? Metal Control, Metal Strengthening, Metal Permanent, Fine Control, Metal Body... I'm sorry, but as long as there's metal, I'm God!

When the drainage branch pipe is connected to the horizontal main pipe, the connection point shall not be less than 0.6 meters below the turning point.

The difference between the horizontal branch drainage pipe and the horizontal main drainage pipe was their function and connection method. The horizontal branch drainage pipe was a horizontal pipe section connected to the sanitary ware, usually connected vertically or diagonally to the main pipe. It was used to distribute water to different zones or floors and supply specific faucet or equipment through the horizontal branch pipe. The horizontal main pipe was the main pipe in the system, also known as the main pipe. It was usually in the basement or buried. It went from the water source to the most unfavorable point. The most unfavorable point was usually the farthest water distribution point or the water distribution point at the elevation. Therefore, the difference between the horizontal branch pipe and the horizontal main pipe was their function and location.

Spiral drainage pipe was a kind of pipe used in building drainage system, which had some characteristics and advantages. Spiral drainage pipe has the following characteristics: 1. Reduce noise: The design of the spiral drainage pipe can effectively reduce the noise pollution caused by drainage. The measured results showed that compared with the traditional cast iron drainage pipe, the noise of the spiral drainage pipe was about 2 to 4 decibels lower, and it had a silencing effect. 2. To prevent the damage of the floor drain seal: The spiral structure inside the spiral drainage pipe can reduce the pressure fluctuation in the pipe, avoid the damage of the water seal caused by the negative pressure of the upper user and the positive pressure of the bottom user, and improve the stability of the drainage system. 3. Increase drainage efficiency: The internal spiral structure of the spiral drainage pipe increases the friction resistance of the water flow, preventing the water flow from blocking the pipe due to inertia, improving drainage efficiency and reducing the occurrence of blockage accidents. 4. [Double silencing effect: Hollow wall spiral drainage pipe is a special structure of spiral drainage pipe. It has a double-layer structure and honeycomb-shaped holes, which can further isolate noise and have a better silencing effect.] In general, the spiral drainage pipe had the advantages of reducing noise, preventing the damage of the floor drain seal, and improving drainage efficiency. They are commonly used in the drainage system of buildings, especially for the drainage of single standpipes in high-rise buildings.