What are the different colored PVC pipes? What are they used for?

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What are the different colored PVC pipes? What are they used for?

Another important thing for water pump installation is the “water pipe”. When installing a water pump, you must choose the correct water pipe. When installing a water pump, most pipes used are PVC (Polyvinyl Chloride) pipes, which are made from polyvinyl chloride material. They are flexible and durable, lightweight, and commonly used in plumbing systems, electrical wiring systems, and drainage systems. However, PVC water pipes come in many colors, depending on their use. Each color has different properties. In this article, we will look at the differences between different colored PVC pipes and what they are used for.

1.Blue Pipe

Blue PVC Pipe

Blue PVC pipe is used for water for consumption, drinking water, and indoor water supply systems. *Blue PVC pipe is the most suitable for water pumps. It's lightweight, readily available, easy to install, and inexpensive. It has a lifespan of up to 20 years. It's most commonly used for plumbing and electrical work within homes, medium-sized buildings, and high-rise buildings. Blue pipe is classified into classes 5, 8.5, and 13.5, while fittings are divided into two classes: thin (8.5) and thick (13.5). Pipes for drinking water or use in bathrooms should use class 13.5, as the material must withstand constant pressure as it exits the water pump. Wastewater pipes lack internal pressure, and classes 8.5 or 5 can be used, depending on suitability.

2. Green Pipe

Green PVC Pipe

Green PVC pipe is made from PP-R (Polypropylene Random Copolymer) and is ideal for plumbing applications. Its advantages include no leaks and a lifespan of at least 25 years. Its disadvantages include its higher price compared to other plastic pipes. The material can be bent more than PVC but less than PE. It is commonly used in homes, medium-sized buildings, high-rise buildings, and industrial plants. It is categorized into cold and hot water pipes. It can be used instead of copper pipes for hot water or warm water from water heaters. For residential applications such as houses and apartments, it is commonly used for plumbing clean water. Large wastewater pipes are not commonly used due to their cost and difficulty in installation, as heat is required. The welder must have a specialized welding machine for this type of pipe.

3. Yellow Pipe

Yellow PVC Pipe

Yellow PVC pipe, or yellow electrical conduit, is made from Polyvinyl Chloride (PVC) and infused with a plasticizer to make the yellow PVC flexible, allowing for easy bending. It is manufactured to TIS 216-2524, Grade 1, the standard for rigid PVC pipes for electrical and telephone cables.

The advantages of yellow PVC pipe include its safety as an electrical insulator, its safety in the event of a leak, and its non-flammable properties in the event of a fire. It is lightweight and easy to install, either on the ceiling or in the wall. It can be bent up to 90 degrees thanks to the addition of a plasticizer, which increases flexibility and resistance to impact and weight. It also comes with connectors and bends for corners and direction changes, and is available in both thick and thin options.

4. White Pipe

White PVC Pipe

White PVC pipe is similar in function to yellow pipe, but is more versatile because it can be bent more easily. It emphasizes a consistent design. It is used for wiring and telephone cables, and is placed exposed on interior walls, blending seamlessly with the walls. However, there are currently no Thai standards, making it difficult to find. Some factories produce it in four-meter lengths, while others produce it in three-meter lengths. However, most manufacturers adhere to Japanese standards, or JIS.

Later, white PVC pipe became more popular for certain agricultural applications. Traditionally, blue PVC pipe was used because it was cheaper. However, blue PVC absorbs more UV light than white PVC, making it more brittle. Farmers now have the option of purchasing blue PVC pipe and painting it white themselves, or paying a bit more for white PVC instead. White PVC pipe is 20-30% more expensive, is not available in large sizes, and is also more difficult to find.

5. Grey Pipe

Grey PVC Pipe

Gray PVC pipe is used for drainage pipes. The gray color is chosen to indicate to the contractor that the water passing through this color pipe is not drinkable or usable. Gray PVC pipe is thin, can withstand low water pressure, and is significantly cheaper than blue pipe. Later, people started to use cheap blue PVC pipe instead of gray PVC pipe because it is easier to find and more durable. However, if you are wondering whether each type of pipe can be used interchangeably, it is recommended not to use them interchangeably. This is because the contractor or project owner must choose the quality of PVC pipe that is appropriate for the application. For example, the thickness or durability should be the same. And the PVC pipe manufacturer will not certify the quality. If the contractor uses it and the PVC pipe breaks or later has problems, the contractor will not be able to find someone to take responsibility.

Piping system for water pump installation

• The most important thing to consider when installing a water pump is to choose pipes that meet TIS standards. PVC pipes that meet TIS standards can withstand a pressure of up to 8.5 bars, and regardless of the pump's wattage, they won't rupture the pipe.

• The pipe and pump should be installed at the same level. Otherwise, the pipe may crack.

• The pump's suction and discharge pipes should be the same size. If they are too small or too large, the pump's efficiency will decrease.

When installing a water pump, choose the correct color, type, and size of pipes. The pipe system should also be properly laid out to ensure optimal pump performance and ensure safe water and electrical use.

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