Ethan Clarke
Fittings for plastic radiators are a crucial aspect of any plumbing or automotive system, ensuring the secure connection of pipes and hoses to the radiator. However, attaching fittings to plastic radiators can be challenging due to the unique characteristics of plastic as a material. Various methods are available, including quick-connect fittings, spring-loaded clamps, and silicone hoses with double-clamped ends. The choice of method depends on factors such as the accessibility of the connection, temperature variations, and the need for flexibility in the hose. Understanding the advantages and limitations of each attachment method is essential to ensure a secure and long-lasting connection that prevents leaks and withstands system pressures.
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What You'll Learn
Using plastic pipe into rad valves
Plastic pipes can be used to connect to radiators. When using plastic pipes, it is recommended to use speed fit liners with seals or wrap PTFE around the olive prior to connection. The plastic pipe can be connected to the radiator valve using an insert on the end of the pipe. This allows for a neat installation where the pipe comes out of the wall directly into the valve without any visible bends.
When installing plastic pipes with radiator valves, it is important to ensure that the pipe and valve sizes match. For example, a 10mm fitting requires a 10mm pipe and a 10mm rad valve. It is also recommended to use Drayton 10mm rad valves and TRVs for instant push-fit connections.
In some cases, it may be preferable to use copper pipes instead of plastic pipes for aesthetic reasons. Copper pipes can provide a neater appearance, especially when using chrome brass fittings instead of plastic bends. However, plastic pipes with inserts can still be used for a functional installation.
When working with plastic pipes and radiator valves, it is important to consult a professional plumber to ensure proper installation and avoid potential issues. Rushing ahead without proper guidance can lead to problems and additional costs. Therefore, seeking advice from experienced individuals or forums is recommended before attempting any plumbing work.
Overall, plastic pipes can be effectively used with radiator valves by utilizing inserts and ensuring proper sizing. However, considerations should be made regarding aesthetics and the potential benefits of using copper pipes for a neater appearance. Consulting with a qualified plumber is always advised to ensure a successful outcome.
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Applying glue inside the hose
When attaching fittings to a plastic radiator, it is important to consider the type of hose clamps to use. Spring-loaded clamps are recommended for plastic radiators as they expand and contract with temperature variations, maintaining a constant tension and seal on the hose. Worm gear hose clamps, on the other hand, may not provide an effective seal and can leak.
To ensure a tight seal and prevent leaks, applying glue inside the hose can be beneficial. Here are some detailed instructions on how to apply glue inside the hose when attaching fittings to a plastic radiator:
Prepare the Hose:
Start by inspecting the hose to ensure it is clean and free of any debris or residue. It is important to work in a well-ventilated area when using adhesives.
Choose the Right Glue:
Select a suitable adhesive for the job. Super glue, silicone glue, or rubber glue can be effective for bonding rubber hoses. Choose a thin glue that will not clog the hose. Consider the compatibility of the glue with the hose material to ensure a strong bond.
Apply the Glue:
Using a small applicator or brush, carefully apply a thin and even coat of glue to the inside of the hose. Ensure that you only apply glue to the areas that will be in contact with the fitting to avoid excessive glue buildup. Allow the glue to dry or cure according to the manufacturer's instructions.
Lubrication (Optional):
In some cases, you may choose to apply a small amount of lubricant to the outside of the smaller hose. This can help with assembly and can be done in conjunction with gluing. An option is to use alcohol as a lubricant, as it will evaporate, leaving a small amount of glue to create friction and hold the hose in place.
Assemble the Fittings:
Once the glue has dried or cured, carefully insert the fittings into the hose. Ensure that the fittings are securely seated and aligned correctly. Verify that there is no glue or debris blocking the hose after insertion.
By following these steps and applying glue inside the hose, you can create a strong and leak-proof connection between the fittings and the plastic radiator. It is important to allow adequate curing time for the glue and perform a final inspection before using the radiator.
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Using zip ties
Zip ties can be used as a temporary fix for attaching fittings to a plastic radiator.
Firstly, it is important to note that cheap zip ties may loosen over time, melt due to the heat of the radiator, or not provide enough surface area to hold the hose in place securely. More expensive zip ties are likely to be more durable and effective.
To attach the fittings to the radiator using zip ties, start by ensuring that the radiator is turned off and there is no water flow. Drain the radiator if necessary. Next, take your zip ties and carefully wrap them around the fittings, ensuring that the zip ties are tight and secure. Cut off any excess material from the zip ties if needed.
It is important to note that zip ties may not provide the same level of security as other methods, such as spring-loaded clamps, which can expand and contract with temperature variations while keeping the hose sealed. Additionally, there is a risk of cracking the weld at the radiator fitting or breaking the fitting if there is no room for hose flexibility.
Therefore, while zip ties can be used as a temporary solution, it is recommended to consult a professional or refer to other methods for a more permanent and secure attachment.
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Using spring clamps
When attaching fittings to a plastic radiator, it is recommended to use spring clamps instead of worm gear hose clamps. Spring clamps are spring-loaded, allowing them to expand and contract with temperature variations while maintaining a constant tension on the hose. This helps to prevent leaks and ensures a tight seal.
Spring clamps are particularly useful when access to the radiator is tight, as they can be challenging to manoeuvre in confined spaces. They are designed to expand and contract while maintaining constant pressure on the hose and plastic radiator necks. This dynamic ability to adjust to temperature changes makes spring clamps more effective than worm gear clamps, which can leak if not fully tightened.
To install a spring clamp, first ensure that the radiator and hose are clean and dry. Position the spring clamp over the hose, aligning it with the radiator neck. Using a clamp tool or a pair of pliers, compress the spring clamp and insert it into the radiator neck. Release the compression, allowing the spring clamp to expand and secure the hose in place.
It is important to verify that the spring clamp is securely attached and that the hose is properly seated inside the radiator neck. Inspect the assembly for any signs of leakage or loose connections. If necessary, adjust the spring clamp's tension by compressing or expanding it slightly to achieve a tight and leak-proof seal.
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Using Drayton 10mm rad valves and TRVs
Fittings are attached to plastic radiators using valves and thermostatic radiator valves (TRVs). These valves are essential for controlling and enhancing the functionality of radiators. When using Drayton 10mm rad valves and TRVs, there are a few steps to follow for a secure and proper installation.
First, it is important to ensure that the pipework is compatible with the valves. Most modern valves and TRVs come with a 1/2" tailpipe fitting for the radiator and a 15mm compression fitting for the existing pipework. If you have 22mm pipework, simple screw-in adaptors are available. For older homes with 1/2" or 3/4" pipework, a specific 3/4" valve or adaptor is required, and these pipe sizes need a threaded pipe.
Once you have confirmed compatibility, cut the pipe to size and ensure it is correctly aligned with the radiator valve. This step is crucial, as it ensures a snug and secure fit. Position the pipe in the valve before tightening the nut. You will hear a pop as the adaptor separates and fuses to the pipe, creating a watertight seal.
After assembly, pressure test your system and monitor the valves for leaks as they reach the desired temperature. It is recommended to use a radiator protector and inhibitor to maintain the longevity of your central heating system.
Additionally, if you are working with Drayton 10mm rad valves and TRVs that have compression fittings of 15mm, but your pipe is 10mm, you can use the supplied reducers and olives. Cut the pipe and fit new olives and pipe inserts, or reuse the existing ones if they are in good condition. Wrapping the olive in PTFE may be beneficial. Secure the reducer in the bottom of the valve, add the nut and olive to the pipe, and clamp it to the valve.
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Frequently asked questions
It is recommended to use spring-loaded clamps for plastic radiators as they expand and contract with temperature variations, keeping the hose sealed. Worm gear clamps are not suitable for plastic radiators as they can cause leaks.
Yes, you can use plastic pipe for radiator valves. However, it is important to note that plastic bends can break off if caught or over-tightened, so some recommend using chrome brass bends instead.
To disconnect a plastic radiator fitting, turn off the valves on both sides and drain the radiator. Then, fit the tails to the new radiator and reconnect the valves. Finally, top up the system with water and extra inhibitor if needed.
