PVC drain pipe plug type: common specifications and installation methods

In a PVC drainage system, a plug is an "invisible guardian" - it seals the end of the pipe and the gap between the inspection port tightly to prevent sewage leakage, odor reversal, and even prevent pests from getting into the home. Many people stare at water pipes and pipe fittings when decorating, but ignore this small part. As a result, it doesn't take long for water to leak all over the floor, and they regret it. Today, I will explain the types, specifications and installation methods of PVC drain pipe plugs to help you avoid stepping on pits.

Let's talk about the type first. Plugs of different structures have to be selected for different scenarios: the most commonly used is the pipe cap plug, which looks like a "small hat" and is integrally formed and directly set on the end of the pipe. This kind of plug has zero difficulty in installation, does not require tools, and is suitable for small-diameter pipes such as DN50 and DN75 (such as branch pipes under basins and floor drain connecting pipes); then there is a plug plug, like a "plug" with a rubber ring, which can be sealed by inserting it into the nozzle. Its advantage is that it is flexible and can be plugged and unplugged repeatedly. It is used to block pipes during decoration to prevent debris from falling into the water, or to temporarily seal it during maintenance. There are also wire plugs with threaded surfaces, which must be used with pipe fittings with inner wires. This kind of plug has the strongest sealing performance and is not easy to loosen after being screwed on. It is suitable for large-diameter supervisors of DN100 and DN150 (such as the end of the kitchen main drain pipe and the balcony rain pipe); finally, it is an expansion plug, which relies on rotating bolts to open the internal expansion sleeve. It can be adapted to different pipe diameters (such as non-standard pipes between DN75-100). It is very convenient to use in emergencies, but do not use it for a long time - the expansion sleeve will age and loosen over time.

Let's talk about the specifications again. The size of the plug must be tightly matched with the diameter of the pipe. The commonly used caliber of PVC drain pipes corresponds to the plug specifications: DN50 (2 inches, commonly used for washbasins and floor drains), DN75 (3 inches, shower area, small balcony), DN100 (4 inches, toilet pipe, kitchen main drainage), DN150 (6 inches, public area or large apartment main drainage), DN200 (8 inches, commercial buildings). When buying, be sure to say "nominal diameter", don't take it wrong - for example, the plug of DN50 can't be covered with the pipe of DN75, and it will leak if stuffed in.

focuses on the installation method. In fact, it is very simple. Follow the steps: the first step is to clean the nozzle, use sandpaper to grind off the burrs and dust at the nozzle, otherwise the plug cover will not be tight and dirty things will be hidden; the second step is to choose the right plug, use wire for long-term sealing, and temporarily use plug type; the third step is to install by type: if the pipe cap type, apply a layer of PVC special glue to the nozzle and the inner wall of the plug (to be evenly coated, do not miss coating), quickly put it in, turn it a little to let the glue fit, and wait 24 hours for the glue to dry before using it; if the plug type, check whether the rubber ring is broken, insert it directly and press it until it is "stuck"; the wire plug should first wrap a few circles of raw material tape on the thread (clockwise, otherwise it will be screwed) When it will loosen), then align the inner wire of the pipe fitting and slowly tighten it with a wrench - don't use too much force, it is easy to crack the thread; for the expansion type, plug it into the nozzle and screw the top bolt until it feels tight, pull it to see if it is firm.

Finally, a few reminders: do not buy inferior plugs, recycled materials will crack in a few months; PVC glue should be used for special use, do not use 502, which will corrode the pipe; temporary plugs should be replaced and fixed after use, otherwise the rubber ring will leak due to aging; regularly check the plug for cracks, discoloration, and change it in time.

In fact, the plug is selected correctly and installed correctly, which can save the drainage system for several years. Next time you decorate or repair, don't ignore this small part!