Understanding the Nominal Length of PVC Pipes: A Comprehensive Guide
When dealing with PVC (Polyvinyl Chloride) pipes in plumbing, one of the key factors to consider is their nominal length. This article delves into the standard lengths of PVC pipes, distinguishing between versions available from trade supply houses and big box stores. We also explore the importance of knowing the nominal system used for selecting compatible parts.
Standard Nominal Lengths of PVC Pipes
The nominal length of PVC pipes is crucial for ensuring proper installation and compatibility. Typically, the nominal length can be either 10 feet (3.05 meters) or 20 feet (6.1 meters). However, the most common length sold, and the most convenient for many consumers, is 10 feet (3.05 meters).
It's important to note that the length of PVC pipes sold in different retail environments may vary. While plumbing supply houses tend to offer 20-foot lengths, big box stores and hardware stores often sell 10-foot lengths for smaller repair convenience.
Nominal vs. Normal: Clarifying the Terminology
Sometimes, particularly among those less familiar with plumbing terminology, the word "nominal" can be confused with "normal." The nominal system in PVC pipes is a standardized size system that helps in selecting compatible fittings and parts. The word "nominal" refers to the size of the outside diameter (OD) of the pipe, which is rounded to the nearest millimeter or half-millimeter.
For instance, a PVC pipe with a nominal size of 10mm would have an outside diameter of 3/8 inches. This system is designed to simplify the selection process, making it easier to find compatible parts without going through a complex sizing chart.
Specific Nominal Lengths and Their Implications
Depending on the intended use, different nominal lengths are available. For instance, 10-foot lengths are common for smaller installations or repairs, while 20-foot lengths are more typical for bulk purchases or large-scale projects. When choosing the length, it's important to consider the specific needs of the installation.
Lesso PVC pipes, like many other brands, offer a variety of lengths to cater to different needs. For instance, if you need to extend a pipe or connect multiple sections, you can use PVC glue or fittings to join the segments together. This flexibility ensures that you can create the necessary lengths for any installation.
The Nominal Diameter and Its Importance
The nominal diameter (OD) of PVC pipes is a crucial aspect to consider. This size is rounded to the nearest millimeter or half-millimeter, which simplifies the selection process for fittings and other components. For example, a 10mm (3/8 inches) nominal diameter PVC pipe would have an outside diameter of 10mm.
PVC pipes come in various sizes, from as small as 1/2 inch to larger diameters. The nominal system makes it easier to ensure that all components are compatible. For instance, a 10mm fitting will always be compatible with a 10mm pipe, regardless of the schedule (the thickness of the pipe walls).
It's important to understand that while the outside diameter (OD) is constant for a given nominal size, the inside diameter (ID) may vary based on the schedule. However, the outside diameter of the fitting is always the same as the inside diameter of the pipe it is meant to connect to, ensuring a snug fit and a watertight seal.
Common Applications and Best Practices
Knowing the nominal length and diameter of PVC pipes is essential for proper plumbing installations. For instance, 20-foot lengths are often available at trade supply houses for larger projects, while 10-foot lengths are more common at big box stores for smaller repairs or DIY projects.
Trade supply houses often offer a range of pipe lengths to accommodate different needs. If you require a shorter length, you can ask nicely and they may lend you a saw to cut the pipe to the desired length. This flexibility ensures that you can create the exact length needed for your project.
When selecting PVC pipes, always refer to the nominal system and the OD chart to ensure compatibility. This will help you avoid compatibility issues and ensure a successful installation. Whether you're a professional plumber or a DIY enthusiast, understanding the nominal length and diameter of PVC pipes is crucial for a wide range of plumbing applications.