Advantages of using PVC for Plumbing applications

INSIGHT

Q: I am considering using PVC plastic pipe instead of copper for some water lines in my home. What are the advantages of using PVC?

A: Several types of plastic pipe are used in household plumbing, and they have some advantages over copper or other metals. In general, plastic pipes are less expensive, won't rust or corrode, and are much easier to handle and install than metal pipes. (Joints are frequently "solvent welded," which is much like gluing, instead of requiring solder or threads.)

Plastic pipe and installation materials are sold at many home centers and plumbing-supply outlets.

However, it is important to pick the right type of plastic pipe for the application and to make sure its use is permitted by plumbing codes in your municipality. Always check with a local building or plumbing inspector before starting a plumbing project of this type.

Remember to clean the joints well with the PVC pipe cleaner first before gluing. A small amount of cleaner is sufficient to clean the inside and outside of each pipe or joint. This provides a better surface bond for the adhesive. Too much cleaner will breakdown the plastic and cause a weakness in the structure and consistency of the pipe itself.

The same goes for the glue. Do not over do it. Too much solvent will melt the plastic. Also causing a weakness in the composition. A small amount applied with the applicator is all that is required to make the bond effective.

Once you have cleaned the surfaces and applied the solvent, simply join the two (male to female union) and hold for a brief moment. Making sure not to turn or dis-connect that union.

PVC (polyvinyl chloride), a rigid white pipe, is generally used for drain-and-waste and vent lines and for carrying cold water. Joints are solvent welded.

CPVC (chlorinated polyvinyl chloride) is rigid and cream-colored and can be used for hot- or cold-water lines. Joints are solvent welded.

PB (polybutylene), a flexible pipe that is frequently gray in color, also can be used for hot- and cold-water lines. PB joints are generally made with compression fittings rather than solvent welding.

ABS, a rigid black pipe with an unpronounceable chemical name, is sometimes used for drain-and-waste and vent lines.

Plastic pipe will last for years longer than traditional copper pipe. And it makes for easier fixing should you decide to add on or service at a later date.

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