Sofia Martinez
Plastic push-fit fittings are a quick and easy way to replace and repair plumbing installations in any home. They are probably the easiest of all plumbing fittings to use, and no special tools are required to make the joints. However, special attention must be paid when cutting the pipe as the O ring inside the fittings can be easily damaged. Plastic push-fit fittings offer a wide range of advantages, including their ability to create watertight seals, reducing the risk of leaks and burst pipes. They are also resistant to corrosion and scale build-up, and highly resistant to impact.
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What You'll Learn
Use the correct pipe cutter
When fitting plastic push-fit fittings, it is important to use the correct pipe cutter. Using a hacksaw is not recommended, as cutting imperfections can increase the risk of leaks. Instead, opt for a dedicated pipe cutter designed specifically for the type of pipe you are working with. For example, use a pipe slice for copper pipes and dedicated plastic pipe cutters for plastic pipes.
Plastic pipe cutters are designed to provide clean, perpendicular cuts without crushing the pipe. They help ensure that the pipe is not damaged during the cutting process, reducing the risk of leaks and ensuring a secure connection. These cutters often come with a reamer tool at the back, which can be used to smoothen and deburr the pipe after cutting.
If you are using a copper pipe, a pipe slice or a rotational pipe cutter is the appropriate tool. These cutters are designed to provide precise cuts on copper pipes, reducing the risk of burrs or imperfections that could compromise the watertight seal. It is important to note that copper pipes require a different type of cutter than plastic pipes.
In some cases, a pipe cutter may not be readily available. If you don't have access to a pipe cutter, it is possible to use a hacksaw, but it requires extra caution. When using a hacksaw, take your time and ensure that the cut is as smooth and straight as possible. After cutting, use a file or a deburring tool to remove any burrs or sharp edges that could damage the "O" ring or compromise the connection.
Overall, using the correct pipe cutter for plastic push-fit fittings is crucial to achieving a secure and leak-free connection. Dedicated pipe cutters for plastic or copper pipes will help ensure a clean and precise cut, reducing the risk of imperfections and leaks. While a hacksaw can be used as a last resort, it requires careful handling and additional steps to ensure a safe and proper connection.
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Ensure the correct insertion depth
Ensuring the correct insertion depth is a vital step in the push-fit installation process. The pipe must be cut as squarely and roundly as possible to ensure it fits securely in the push-fit fitting and to avoid leaks. When measuring the length to cut, remember that about one inch of the pipe goes into the push-fit connector. This is the correct measurement of the fitting's depth.
Before inserting the pipe, it is important to mark the depth of the fitting on the pipe. This can be done with a marker and a deburring-depth gauge tool. Insert the tool into the pipe's end until it stops, then mark the tube at the edge of the tool. Alternatively, a measuring tape can be used instead of a deburring depth gauge tool. This way, you can be sure that the pipe has been pushed in far enough.
Once the pipe is cut to length, push a pipe insert into the end that will be inserted into the fitting. Check both the insert and the pipe for any score marks that could cause leaks, as well as any burrs or rough edges that could damage the O-ring in the fitting. Make sure the insert is pushed in firmly and fits snugly. If it is loose or easily moved, it is not the correct insert, and the joint may leak.
Finally, insert the pipe into the fitting, ensuring it passes through the O-ring until it reaches the stop point and correct insertion depth. Rotate the fitting or pipe 360 degrees clockwise or anticlockwise to install it and establish a firm connection.
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Understand the locking mechanism
Understanding the locking mechanism of plastic push fit fittings is essential for ensuring secure and leak-proof connections. These fittings typically consist of two main components: the threaded end and the hose end.
The threaded end of the fitting is designed to connect to a system port or another fitting. It provides a secure threaded connection point, allowing for easy integration into existing systems. This end usually requires a hose clamp to secure the connection.
The hose end, on the other hand, features a barbed structure designed to grip the inside of the hose. These barbs create friction and hold the hose securely in place. The barbs on the insert prevent the hose from slipping out and provide a tight seal. This design enhances the fitting's grip and provides additional security, especially when used with hose clamps.
To further enhance the security of the connection, a hose clamp can be used. The hose clamp compresses the hose around the barbed insert, preventing any potential slippage and ensuring an even tighter seal. This combination of the barbed insert and hose clamp creates a secure and leak-proof connection.
When it comes to removing the pipe from the fitting, the process is just as straightforward. Simply undo the twist lock by turning it and push the collar towards the fitting while pulling the pipe away. This will safely release the pipe from the fitting.
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Avoid using chrome-plated pipes
Plastic push fit fittings are probably the easiest of all plumbing fittings to use. No special tools are required to make the joints, although special attention must be paid when cutting the pipe. This is because the "O" ring inside the fittings can be easily damaged, so it is essential to use the correct cutter. For example, use a pipe slice for copper pipe and dedicated plastic pipe cutters for plastic pipe.
However, push fit fittings cannot be used on chrome-plated pipes. This is because the grip rings in the fittings are not strong enough to grip the chrome. Therefore, if you want to use push fit fittings, you will first need to remove the chrome plating from the pipe. This can be done using an emery cloth, wet and dry paper, or a file, but it requires patience and hard work.
An alternative to removing the chrome plating is to use a compression joint to join two chrome-plated pieces of pipe. Compression fittings are easy to use and require the least preparation. They can also be purchased with a chrome plate finish, so they match the pipe.
To use push fit fittings, first, cut the pipe to the correct length using dedicated pipe cutters. Then, push an insert firmly into the end of the pipe. Hold the pipe next to the fitting and mark it using a felt-tip pen so you know how far to insert it into the fitting. Push the pipe fully into the fitting and tighten the fitting by hand. When the pipe is fully inserted and locked in place, pull on the fitting and the pipe to ensure it is located correctly. Once the stainless steel grip ring inside the fitting has gripped the pipe, it is impossible to pull the pipe out without undoing the twist lock mechanism and pushing the plastic collar towards the fitting.
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Choose the right pipe inserts
Choosing the right pipe inserts is crucial for ensuring a secure and leak-proof connection when installing plastic push-fit fittings. Pipe inserts, also known as pipe stiffeners, play a vital role in reinforcing and strengthening the side walls of plastic water pipes. Here are some essential factors to consider when selecting the right pipe inserts:
- Pipe Material: Pipe inserts are specifically designed for use with plastic water pipes. They are not required when connecting push-fit parts to copper pipes, as copper pipes inherently maintain their strength. Therefore, it is important to choose pipe inserts compatible with the type of pipe you are using, whether it is PEX, PVC, or another plastic pipe material.
- Manufacturer Recommendations: Different manufacturers of push-fit fittings may have specific requirements or recommendations for pipe inserts. It is important to refer to the instructions and guidelines provided by the manufacturer of your chosen push-fit fittings. Some brands, such as JG Speedfit, are often recommended for their ease of use and effective design.
- Pipe Size and Compatibility: Pipe inserts vary in size, and it is crucial to select an insert that is compatible with the size of your pipe. The inserts should fit snugly inside the pipe to provide adequate reinforcement. Check the inner diameter of the pipe and choose an insert size that corresponds to the pipe brand or manufacturer.
- Water Temperature: When working with hot and cold water circuits, it is important to use the correct pipe inserts and fittings. Red and blue collet clips can be used to help identify whether the circuit is for hot or cold water, ensuring that the right components are used accordingly.
- Insertion Depth: Marking the correct insertion depth on the pipe before installing the pipe insert is essential. This ensures that the pipe insert is pushed in far enough and aligns correctly with the locking mechanism of the push-fit fitting.
- Preventing Deformation: Pipe inserts play a crucial role in preventing plastic pipes from deforming under pressure. This helps to maintain the structural integrity of the pipe and ensures a secure grip ring and seal within the push-fit fitting, reducing the risk of bursts or leaks.
Remember to always follow the manufacturer's instructions and industry best practices when choosing and installing pipe inserts for plastic push-fit fittings.
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Frequently asked questions
Plastic push-fit fittings are a quick and easy way to replace and repair plumbing installations in any home. They are cost-effective, flexible, and highly resistant to corrosion, scale build-up, impact, leaks, and burst pipes.
Before installing plastic push-fit fittings, ensure that you are using the correct pipe inserts for the type of pipe you are using. Mark the pipe with a pen to indicate how far to insert it into the fitting. Be careful when cutting the pipe to avoid damaging the "O" ring inside the fitting.
To remove the pipe from the fitting, undo the twist lock by turning it and push the collar in towards the fitting while pulling the pipe away.
