Complementary flanges match and connect with other flanges, allowing for easy disassembly and access in plumbing emergencies. They come in different materials and can be used to mix different types of plumbing. Flanges can also be used to create access points and connect future plumbing lines.
A complementary flange is a flange that matches another flange. Having bolt holes that line up with another flange is a feature of this type of flange. The complementary flange is an important component of a pipeline or plumbing system. In most situations, this flange is attached to another pipe’s flange and then the pipeline is assembled to fit tightly between the two flanges. A threaded companion flange is also used on plastic pipe when adding threaded iron pipe into the pipeline.
In a typical pipeline, changing the size and dimensions of the pipe is usually done by inserting a reducer into the line. When changing pipe size on a section of pipe that could be removed, a complementary flange is used to allow for simple pipe disassembly in the future. By inserting a flange into the pipeline and using a gasket to seal the two sections, a joint is created which offers easy access in the event of a plumbing emergency. The companion flange is also a cost effective way to allow for expansion of the pipeline in the event of future construction additions.
There are many types of complementary flanges made from many different materials. This allows you to combine two or more types of plumbing into one system without having to replace the entire system. Copper can be added to a plastic system just as iron pipe to a brass fitting and so on. Mixing the different materials requires only a matching flange and a gasket. Often an anti-seize compound is used on the fasteners of two different material flanges. This is important to avoid oxidation and rust.
It is common practice for a plumber to install an access point in a plumbing line to assist in clearing a blockage. Installing a flange to seal the inspection opening is also used to connect future plumbing lines when more lines need to be added. It is for this reason that the companion flange on the access point is often a closed flange used to seal an open pipe. The closed flange can be replaced in the future should the need arise to modify it. By placing flanges within a pipeline, the pipeline becomes a less confusing component of a building or system and makes future additions or subtractions an easy task to accomplish.
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