Chloe Zhang
Radiators are an essential component of plumbing and heating systems, and the pipes that connect to them can be made from a variety of materials, including copper and plastic. While copper has traditionally been the go-to option for heating installation pipes, plastic pipes have become increasingly popular for radiators due to their flexibility, corrosion resistance, and quietness. However, plastic pipes may not be suitable for all applications, and extending plastic radiator pipes can be a challenging task. In this discussion, we will explore the options and considerations for extending plastic radiator pipes, including the benefits and drawbacks of different pipe materials, to help homeowners and DIY enthusiasts make informed decisions about their plumbing and heating systems.
Characteristics and Values Table for Extending Plastic Radiator Pipes
| Characteristics | Values |
|---|---|
| Extenders | Tail extenders are available in DIY stores, but they only extend up to 70mm. |
| DIY Approach | Consider cutting the pipe, inserting a new piece of pipe with the desired length, and connecting the return pipe ends with suitable connectors. |
| Pipe Material | Plastic pipes are a popular alternative to copper for general pipework due to their flexibility, corrosion resistance, and ease of installation. However, they may not be suitable for visible areas due to their appearance and durability concerns. |
| Connector Type | When using plastic pipes, ensure compatible connectors are used, especially when dealing with soft PVC pipes. |
| Drain System | Draining the system may be necessary when installing new pipe fittings, but some DIY enthusiasts suggest using a freezer system to plug the pipe temporarily. |
| Pipe Shape | S-shaped pipe fittings can help extend radiator pipes away from the wall while maintaining the same horizontal position. |
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What You'll Learn
Using copper vs plastic pipes for radiators
Copper and plastic pipes can be used for radiators, each with its own set of advantages and disadvantages. Copper pipes, for instance, are durable, resistant to corrosion, and can withstand high temperatures. They are also malleable, making them easy to form into different shapes and sizes to suit the installation. Copper is also a good conductor of heat, making it suitable for use in heating systems. Copper pipes have a typical life expectancy of 70-80 years. They are also more aesthetically pleasing than plastic pipes, offering a sleeker and more sophisticated look for exposed pipework.
However, copper pipes are more expensive than plastic pipes and can only be used in low-voltage systems. Copper is also a soft metal, which means that it may be more prone to damage during installation or maintenance. Additionally, copper pipes may not be suitable for underfloor heating due to their higher thermal conductivity, which can make them less energy efficient for this specific application.
Plastic pipes, on the other hand, are more cost-effective, especially when extensive piping is required, as in underfloor heating systems. They are also easier to install due to their flexibility, which is advantageous for projects like underfloor heating. Plastic pipes are becoming more popular in contemporary heating systems.
However, plastic pipes may be more prone to failure and can become brittle over time, increasing the risk of leaks. They are also less durable and may require maintenance work due to their lower resistance to high temperatures. Additionally, plastic pipes may not be as aesthetically pleasing as copper pipes, especially if they are exposed. Another drawback of plastic pipes is that they may be susceptible to gnawing by rats or mice.
When deciding between copper and plastic pipes for radiators, it is important to consider factors such as cost, durability, ease of installation, maintenance, energy efficiency, and aesthetics. Both types of pipes have their advantages and disadvantages, and the best choice will depend on the specific requirements and constraints of the project.
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The benefits of plastic pipes
Plastic pipes are becoming an increasingly common choice for radiators. They offer a range of benefits that make them a viable alternative to copper or steel pipes.
Firstly, plastic pipes are less expensive than copper or stainless steel. This makes them a cost-effective option, especially when compared to the higher price of copper.
Secondly, plastic is a poor heat conductor, which means less heat is lost as hot water travels through the pipes. This can improve the energy efficiency of the heating system, ensuring that more of the heat generated by the boiler reaches radiators and taps.
Thirdly, plastic pipes are flexible, which makes them ideal for underfloor heating systems. Their flexibility allows for easy installation and the creation of an extensive grid of piping beneath the floor.
While plastic pipes do have some drawbacks, such as being less durable than copper and potentially more susceptible to rodent damage, they remain a popular choice due to their affordability, energy efficiency, and flexibility for underfloor heating. For those looking for an inexpensive and functional option, plastic pipes offer an attractive alternative to traditional metal piping.
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The drawbacks of plastic pipes
While plastic pipes are a popular choice for plumbing, they do have some drawbacks. One of the main disadvantages of plastic pipes is their bulkiness, which can limit their use in tight spaces. They are usually thicker than metal pipes, making them unsuitable for small or confined areas.
Plastic pipes, specifically those made of Polyvinyl Chloride (PVC), are also susceptible to warping and melting under high temperatures. This makes them unsuitable for transporting hot water. CPVC, a variation of PVC, can withstand temperatures up to 200 degrees Fahrenheit, but it is more expensive and primarily intended for indoor use as extended exposure to sunlight can cause it to break down.
Another drawback of plastic pipes is their lack of antimicrobial properties, which some homeowners consider a health risk. Unlike copper pipes, plastic pipes do not possess the same antimicrobial effects, which can be a deciding factor for those prioritizing health and hygiene.
Additionally, while plastic pipes are generally durable and long-lasting, they are vulnerable to damage from freezing temperatures. Plastic pipes can break if the water inside them freezes, which is a significant consideration for regions with cold climates.
Despite these drawbacks, plastic pipes offer several advantages, including corrosion and rust resistance, flexibility, ease of installation, and cost-effectiveness. However, when deciding between plastic and metal pipes, it is essential to consider the specific application, environmental factors, and potential health concerns to make an informed decision.
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How to cut and connect plastic pipes
Cutting and connecting plastic pipes, whether PVC or ABS, requires careful handling and the right tools. Here is a step-by-step guide on how to cut and connect plastic pipes:
Choosing the Right Tools
First, choose the best cutting tool based on the pipe's diameter and the number of cuts you need to make. A hacksaw is a good option if you only need to make a few cuts. For small pipes with a diameter of 1 inch or less, scissor-type plastic cutters are effective but require more manual effort. Ratchet-style cutters are generally more accurate than scissor-type cutters.
Cutting the Pipe
When cutting the pipe, use a composite material or plastic circular saw blade instead of a standard wood saw blade. Cutting or sawing PVC pipe can leave rough edges and stray fragments. Therefore, it is important to deburr the pipe using a deburring tool or utility knife to remove any shavings or particles. This will ensure a smoother edge, which is crucial for a better connection during the gluing process.
Dry Fitting
Before gluing, dry-fit the pipes and fittings to ensure proper sizing and alignment. Make sure the pipe does not bend or twist. If you are working with ABS pipes, clean them with a chemical pipe cleaner to remove any ink, oil, or dirt, and let them dry before proceeding.
Priming and Gluing
Apply a coat of primer to the end of the pipe and the inside of the fitting using a dauber. Remember that primer is no longer a code requirement for pipes less than 6 inches in diameter, but it is still recommended. Do not use the same dauber for the cement that you used for the primer. Choose the appropriate type of cement that matches the material, and follow the instructions on the package. Apply the cement to the end of the pipe and inside the fitting. Quickly push the connectors together with a twist until properly sealed. Hold the connected pipes for about 30 seconds to ensure a strong bond. Finally, wipe away any excess cement with a rag.
Additional Considerations
Beveling the ends of the pipe, both inside and out, is an important step that is often overlooked. The inside bevel eliminates sharp edges that could catch debris and lead to clogs. Additionally, check your local plumbing codes to find out the required pipe type and size for your specific application.
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Pipe fittings to extend pipes away from the wall
Radiator pipes can be extended away from the wall using pipe fittings, also known as pipe connectors. These fittings are used to attach one pipe to another to lengthen the pipe run or change the flow direction. Pipe fittings come in a variety of types, each with its own unique function and application.
One option for extending radiator pipes is to use an S-shaped fitting, which can provide additional length while maintaining the same horizontal position. This type of fitting can be useful when dealing with space constraints caused by protrusions on the wall. However, it is important to note that installing new pipe fittings may require draining the system, which can be a complex process for those new to DIY plumbing.
Another consideration is the use of tail extenders, which can provide a limited amount of extension. In the case of a DIY enthusiast seeking to extend their radiator pipe by 300mm, tail extenders were insufficient as they could only provide a 70mm extension. This limitation led them to consider cutting the pipe and inserting a new piece of pipe with the desired length, requiring appropriate connectors for soft PVC pipes with a 12mm diameter.
When selecting pipe fittings, it is crucial to choose the correct size and type of fitting for your specific pipe. Pipe fittings come in various sizes, and some are designed with different-sized openings to accommodate transitions between pipe sizes. Common types of pipe fittings include tee and wye fittings, which connect three pieces of pipe, and elbow fittings, which change the direction of flow between two pipes. Other types of fittings, such as slip fittings, compression fittings, and flare fittings, offer secure and specialised connections for different applications.
It is important to assess the specific requirements of your project, including the desired extension length, pipe material, and direction changes needed. This will help guide your choice of pipe fittings to extend radiator pipes away from the wall effectively and safely.
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Frequently asked questions
Plastic pipes are a great alternative to copper for general pipework. They are quiet, corrosion-resistant, and easy to work with. They are also flexible, making them suitable for underfloor heating systems.
Plastic pipes are not as long-lasting as copper pipes and may need to be replaced sooner. The joints on plastic pipes can also be inflexible, making them prone to breaking when installed in tight spaces or where water pressure changes quickly. Additionally, some people may find that plastic pipes look cheap and unattractive.
No, plastic pipes must not be used to connect to a boiler or gas line.
Copper pipes are recommended if you intend to paint them, as they provide a much nicer finish.
One option is to use a freezer system to plug the pipe temporarily while you remove the valve and fit the new piece of pipework.
