Have you ever wondered if you can attach different pipe materials? In fact, you can! In this article, we will give you a step-by-step guide on how to connect PVC to copper pipes. Along with the detailed procedures, we will also list the most recommended fittings according to your needs.
What are the main differences between PVC and copper pipes?
PVC and copper pipes are two of the most popular pipe materials in the plumbing industry. PVC in particular is known for its outstanding corrosion resistance properties, making it suitable for waste pipe systems, drain traps and water supply lines. In addition, this plastic pipe can withstand high water pressure.
Meanwhile, in terms of durability, longevity and material composition, copper wins the competition among all other metal-based pipes. Copper pipes are resistant to both heat and cold, so a perfect choice for water lines. Moreover, they can be easily installed above the surface or underground.
Even with the differences, both PVC and copper pipes meet the appropriate categories. Therefore, some opt to combine these two, either for their functionality or due to material limitations. And if you plan to do so, there are certain things and other key information you should understand in advance.
What are some essentials you need to know beforehand?
Connecting two different pipe materials can be a challenge. Therefore, it is vital to keep some things in mind before starting the process. First of all, you need to consider the measurement of the pipes, especially the thickness. This is crucial to avoid possible leaks during installation.
You also need to consider the depth of the insert using a plumbing tool so you can choose the right size for the connector. Apart from these, you need to make sure that you clean the end of the pipes well. File the edges lightly so that the pipes connect effectively.
How to correctly connect PVC to copper pipe according to the fitting?
There are actually several ways to connect a PVC pipe to a copper pipe. Each method follows a specific guideline and different material requirements. Thus, it is much better to discuss them one by one in detail for better understanding and to choose the right method accordingly.
1. Connecting pipes by compression fittings
This is definitely the most common method when it comes to attachment PVC or CPVC pipes to copper pipes. Why? Because it does not involve gluing. It means no open flame is needed to attach the pipes. In addition to being a safer way to tie the tubes, it is very easy to install.
Often, the compression fitting is highly recommended for longer connections, perhaps over 10 meters in length. This method uses compression or plastic adapters, which then serve as a connection between the two pipes.
Start the process with the plastic fitting and slide a small amount of primer up to the end of the pipe as well as the adapter. Then apply PVC cement to both ends of the pipe before pushing the fitting onto the plastic pipe. Twist a little and hold it steady for a few seconds to make sure the cement hardens.
After preparing the plastic pipes, you can now get the compression nut, which is used for the copper fitting. Unscrew and slide both the nut and the compression ring onto the end of the copper pipe. After that, apply force and screw the nut to the fitting.
Now that both pipe preparations are complete, you can tighten the nut and make sure it tightens the ring. You can use pliers or a pipe wrench to seal the pipes and create a tight seal. Because the connection is already secured, there is no need to use pipe tape or plumbers tape.
The materials you need to purchase include a compression adapter, a compression ring, and a compression nut to make compression fittings, and these are quite expensive. Despite its expensive expenses, the method is still popular because it provides a durable connection that lasts a long time.
2. Joining pipes by soldering
Another way to connect the pipe is by soldering. In this method, you solder the female end of the copper pipe by applying flux. Next, slowly slide the copper fitting over the end of the pipe. Afterwards, connect the female fitting to the copper pipe.
Once these steps are completed, you can now screw in the male plastic fitting. Unfortunately, the bonding process itself does not provide a very solid seal. So, to secure the connection between the female thread and the male thread, it is best to add glue.
Soldering is generally not as safe as it capitalizes on the use of an open flame. So if you do it on your own then you have to be very careful because it can lead to fire accidents.
3. Attaching fittings by pushing
As mentioned earlier, compression fittings are best for long pipe connections. So if you are only making short connections, perhaps around 5 meters long, then push fittings are the most suggested option. This method is very easy and perhaps the fastest way to connect PVC and copper pipes.
In this way, you will not need to use glue or depend on glue. Simply attach the fitting to both ends of the pipes and push the fitting slowly but firmly.
Like compression fittings, it does not require additional sealing using Teflon tape or PTFE tape. It’s because the fitting already comes with an internal O-ring that becomes compacted to ensure a tight seal.
But before you buy push-fit fittings, it is essential to know the exact dimensions. Moreover, you need to have an idea about the types of push-fits so that you can decide the best option. Some of the most common push-ons are elbows, tees, and 1/2″ or 3/4″ couplings. There is also a push-fit with a valve available in the market.
4. Maximizing the shark bite
Next on the list of popular plumbing connections is none other than the shark bite fitting. This has been used by both commercial and residential pipe fittings. Apart from that, it is quite famous when it comes to radiant heating systems.
Installing a shark bite fitting begins by cutting the PVC pipe. You can also use a deburring tool to smooth the edges of the pipe. Afterwards, insert the pipe into the fitting, which then provides a tight seal. Therefore, there is no need for tapes as this method ensures a leak-free connection.
A notable feature when using the shark bite fitting is that you can reuse it up to 4 times. Therefore, if adjustment is needed, simply take the disconnecting pliers and withdraw the connection. In addition, shark bite offers a variety of sizes, making it very popular with DIY users and installers.
5. Installation of thread adapters
Now, for the final recommendation, we have thread adapters. This method highlights the relevance of using a male plastic end as well as a female metal end. It should not be changed as a male adapter can damage the plastic female adapter if pushed too hard.
So to get started you need teflon tape, or if you don’t have one, a pipe would do. Use any of these to pin threaded joints. Then thread the pipe ends to the adapter properly. Care must be taken not to overtighten the connection as this may lead to cracks.
Where to buy different fittings and connection adapters
Plumbing and plumbing is definitely a great way to put your technical skills to good use. Although DIY installations and while repairs can be useful and fun, it can be a challenging feat if you don’t have the right materials.
Therefore, you need to make a trip to your local hardware store to buy all the important accessories. Or, if you prefer, you can opt for online platforms like Amazon and Home Depot for your plumbing needs. But of course, when buying online, you need to check the ratings, reviews and reputation in advance.
In addition, it is important to consider some key properties. For example, if you’re buying a push-fit fitting or a threaded adapter, then your best bet would be something corrosion-resistant and lead-free.
Choosing a material that is resistant to rust and other chemicals is highly recommended to save money on premature replacements. In addition to materials, you also need easy access to various plumbing tools such as pipe wrenches, pliers, disconnect clamps, pipe cutters, and mole handles, among others.
All of these might be quite a big investment, but they are definitely worth it, especially if you have a penchant for doing all the plumbing work yourself. In fact, they can save you thousands of dollars expensive repairs to sanitary installations, if you do not have homeowner’s insurance.
Conclusion
Plumbing installation is a fascinating task that would probably appeal to many homeowners who want to save money on labor costs. The process of connecting the pipes is a gratifying achievement. In addition, you are given different ways to connect one tube to another.
But despite the variety of methods available for connecting PVC and copper pipes, it is still best to stick with the same pipe material for a particular plumbing line. For example, a PVC pipe is a perfect match with a PVC pipe, while a copper pipe is a perfect match with a copper pipe.
