When decorating a drainage system at home, many people will pay attention to the material and size of the main pipe, but often ignore the small accessories that connect, turn, and branch - in fact, these "inconspicuous" accessories are the key to ensuring smooth drainage and avoiding water leakage and bad taste. Today, let's explain the common accessories and special accessories of PVC drainage pipes at one time to help you understand the "role" of each accessory.

first talk about the common PVC drainage accessories. These are the basic models that are almost certain to be used in decoration:

- Direct head: It looks like a short pipe, and can be inserted into PVC pipes at both ends. It is mainly used to connect two straight pipes of the same diameter (such as connecting two 110mm main pipes into longer pipes). When choosing, pay attention to the matching of the inner diameter and the pipe, otherwise it is easy to leak.

- Elbow: Divided into 90 degrees and 45 degrees, used to change the direction of the pipe. 90 degree elbow is often used in corner turning or toilet drain pipe steering; 45 degree elbow is more suitable for diagonal connection, such as balcony drain pipe from the wall to the ground, with 45 degrees to reduce water flow resistance.

- Tee/Tee: Tee is "Y" type or "T" type, used to separate a branch pipe (such as the main pipe to the sink pipe); Tee is "cross" type, can be divided into four pipes, generally used in the centralized drainage of multiple sanitary ware (toilet, sink, shower) in the bathroom.

- Pipe hoop: Also called "clamp", it is a metal or plastic ring set at the pipe interface, used to fix the connection of two pipes and prevent the interface from disengaging when the water pressure is high. Especially for surface-mounted pipes, the pipe hoop can increase stability.

- Floor drain: The drain installed on the ground should not only be able to leak, but also be deodorant and insect-proof. A good floor drain will have a "water seal" or "flap" structure. For example, the floor drain in the bathroom should be deodorant, otherwise the odor of the sewer will go up.

talk about special PVC drainage accessories, these are "functional players" to solve specific problems:

- Water trap: looks like "U" or "P" type, which is the core accessory of anti-odor. Whether it is a sink, a sink or a toilet, a trap should be installed underneath - it will always keep a little water in it, forming a "water seal" to keep the stench of the sewer and cockroaches out. Note that the trap cannot be installed upside down, otherwise the water seal will fail.

- Inspection port: It is a "small window" with a lid, installed on the riser (vertical main pipe) (usually one every two layers). In case the pipe is blocked, open the lid to reach in and unclog, without removing the entire pipe. The main riser in the bathroom at home must leave a check port, otherwise it will be very troublesome to block.

- Cleaning port: Similar to the inspection port, but installed at the end of the horizontal pipe on the ground or wall (such as the end of the horizontal pipe under the kitchen sink). Its lid can be unscrewed to clean up debris in the horizontal pipe, such as hair and food scraps.

- Expansion joint: PVC pipe will expand and contract with heat (longer in summer and shorter in winter), and the expansion joint is used to "buffer" - it has a sliding sleeve that allows the pipe to expand and contract freely to avoid the interface being cracked and leaking water. Almost all risers in high-rise residential buildings must be equipped with expansion joints, otherwise they will definitely leak over time.

- Oblique tee: It is an "oblique tee". Compared with ordinary tee, the water flow from the main pipe to the branch pipe is smoother, and it is not easy to accumulate sewage and block. It is often used in the drainage branch pipe of the shower area or washing machine to reduce the noise and blockage risk caused by the impact of water flow.

- adapter: used to connect pipes of different diameters, such as transferring the 110mm main pipe to the 50mm sink branch pipe, you need a "110 to 50" adapter. When choosing, pay attention to the direction of "variable diameter", don't do it the other way around.

In fact, whether it is a common accessory or a special accessory, the core is to "solve the details of the drainage system" - choose the right accessory, you can avoid 90% of the drainage hazards (such as water leakage, anti-smell, blockage); if you choose the wrong one, no matter how expensive the main pipe is, it is useless. Finally, a reminder: when buying accessories, you should choose products that meet the GB standard. Don't be greedy for cheap and buy inferior goods, otherwise it will age and crack after two or three years, and it will be more troublesome to rework at that time.

Summarized, there is no "excess" of PVC drain pipe accessories, each has its own role. To understand these, whether it is to decorate by yourself or find a master to do it, you can have a bottom line in your heart and will not be "pit"!