PVC drain pipes are the "blood vessels" of household and engineering drainage systems, but to make this set of "blood vessels" run smoothly, it is inseparable from the "connection" and "regulation" of various small accessories. When installing or repairing, many people often find it difficult to figure out the type and purpose of accessories - what joints are suitable for connecting different pipe diameters? Which plug to choose so that there is no leakage? How to choose the valve? Today, I will list all the commonly used accessories of PVC drain pipes and make them clear one by one.

First talk about the most basic "connection" accessories: joints. The straight-through connector is a "straight-line connector", which is directly connected to two pipes of the same diameter (such as the extension of the kitchen sewer pipe). The different-diameter straight-through solves the connection of different pipe diameters (such as 50 pipes becoming 75 pipes), so that the water flow will not be blocked due to sudden changes in pipe diameter. The elbow is responsible for "turning", the 90-degree elbow is suitable for right-angle turning (such as the sink sewer pipe connecting to the main pipe), and the 45-degree elbow is more suitable for slow-bending scenarios (such as the balcony pipe wrapping around the wall), which can reduce the impact of water flow. The tee is a "diverter". The three ports of the positive tee are of the same diameter, which is used for the main pipe to divide the branch pipe of the same diameter (for example, the main pipe of the bathroom is divided into the toilet and the sink); the reducer tee is one of the ports with a different diameter (for example, the 110 main pipe is divided into 50 pipes to the washbasin). The four-way is a "multi-diverter", which is used for the connection of multiple branch pipes in public areas (such as the drainage branch pipe of multiple squatting positions in the public bathroom).

Next is the "plugging type" accessory: plug. The pipe cap plug is a "direct cover", which is set at the end of the pipe and is suitable for the reserved pipe that is not used temporarily (such as the drain pipe reserved during decoration) to prevent sundries from entering The wire plug is a "threaded plug" with an external thread, which is screwed into the pipe port with an internal thread (such as the reserved port behind the valve) for a tighter seal. The stuffy cover is a "accessory occluder", which is used for redundant interfaces of three-way and four-way, and plugging it can avoid water leakage.

Then there are "control" accessories: valves. The ball valve is a "fast-opening and fast-closing valve", and the rotating handle can control the water flow on and off, which is suitable for frequent switching scenarios (such as the water inlet of the washing machine drain pipe). The shut-off valve can "adjust the size of the water flow", such as when the water heater drain pipe needs to adjust the displacement. The check valve is a "one-way door", which only allows water to flow in one direction to prevent sewage from pouring back (such as the drain pipe interface on the first floor) and avoid the trouble of sewage backflow.

Finally, it is an "auxiliary" accessory, although not the core but essential. The pipe card is a "fixer", which fixes the pipe to the wall or ground to prevent shaking; the expansion joint is a "buffer", which solves the problem of thermal expansion and contraction of PVC pipes and avoids pipe cracking; the floor drain is a "ground drain", and the drainage of toilets and balconies depends on it. Choosing a deodorant model can also avoid odors.

In fact, the choice of PVC drain pipe fittings is not so complicated - the connector is responsible for connection, the plug is responsible for sealing, the valve is responsible for control, and the auxiliary accessories are responsible for fixing and protection. As long as you are seated according to your drainage needs, you can make the drainage system run stably. Next time you encounter installation or maintenance, compare this list, and never worry about a bunch of accessories!