PEX to Tub Spout: Comprehensive Guide on Installation and Common Mistakes

PEX plumbing is becoming increasingly popular in modern homes due to its numerous benefits, such as flexibility, durability, and affordability. However, when it comes to connecting the tub and shower valve to the spout, PEX tubing may not be the best choice. In this article, we will explore the reasons why PEX cannot be used in this specific application and discuss alternative plumbing methods.

If you’re considering installing PEX to your tub spout, it’s essential to understand the limitations and potential issues that may arise. So, let’s dive in and learn more about PEX to tub spout plumbing and its compatibility with tub and shower installations.

The most important findings at a glance

  • PEX plumbing has benefits such as flexibility and resistance to corrosion, but it also has limitations, particularly when it comes to water flow in tub and shower installations.
  • PEX cannot be used between the tub and shower valve and the spout due to its effect on water flow and the importance of direct flow to the shower.
  • Other common plumbing methods for tub and shower installations include brass tubing and copper tubing, each with their own pros and cons. Additionally, the correct installation of PEX to the tub spout involves understanding the plumbing layout and following specific steps.

pex to tub spout

Benefits of PEX Plumbing

PEX plumbing revolutionizes the world of pipes. It’s incredibly resistant to corrosion and scale buildup, making it the go-to option for homeowners and plumbers alike. Unlike traditional materials like copper, PEX pipes won’t suffer from reduced water flow or leaks.

They provide a reliable and long-lasting plumbing system that ensures peace of mind and protects against water damage. With fewer joints, the risk of leaks is significantly minimized, saving time and reducing labor costs during installation. In conclusion, PEX plumbing is the superior choice due to its resistance, minimal joints, and easy installation.

Don’t settle for anything less when you can enjoy the countless advantages of PEX plumbing.

Limitations of PEX Plumbing

PEX plumbing, though convenient in many ways, does have its limitations. For instance, it may not be the ideal choice for high-temperature applications due to its inability to withstand extreme heat. If you require hot water at high temperatures, it might be wise to explore alternative pipe options.

Additionally, it’s important to consider the cost of PEX pipes . While they may be more expensive upfront compared to materials like copper or PVC, they do offer long-term benefits such as leak resistance and durability. Furthermore, the installation of PEX plumbing may necessitate the use of special tools and fittings .

Although it is generally easier to install than other materials, it is crucial to have the necessary tools and fittings for a secure and reliable connection. This may require extra time and resources. Therefore, it is essential to carefully weigh the limitations of PEX plumbing before making a decision.

Taking into account factors such as high-temperature applications, cost, and the requirement for special tools and fittings will help ensure the success of your specific project.

pex to tub spout

The Pros and Cons of Using PEX for Tub Spouts: What You Need to Know

  • PEX, or cross-linked polyethylene, is a type of flexible plumbing tubing that is commonly used in residential and commercial plumbing systems.
  • One of the main benefits of using PEX plumbing is its flexibility, which makes it easier to install in tight spaces and around obstacles.
  • PEX plumbing is also resistant to corrosion, making it a durable option for long-term use.
  • However, PEX plumbing does have some limitations, such as its susceptibility to UV light damage and the potential for expansion and contraction due to temperature changes.
  • When it comes to using PEX between the tub and shower valve and the spout, it is not recommended because PEX can restrict water flow, leading to reduced water pressure in the shower.
  • Direct flow to the shower is important for a satisfying shower experience, as it ensures a consistent water pressure and temperature.
  • Common alternatives to using PEX in this area include brass tubing and copper tubing, each with their own pros and cons.

Effect of PEX on Water Flow

When it comes to PEX plumbing, there are a few things you should bear in mind. Firstly, the smaller diameter of PEX pipes can lead to a slight reduction in water pressure. While this may not be noticeable in your everyday tasks, it could affect your showering experience.

Secondly, PEX pipes have lower thermal conductivity, which means hot water may take a bit longer to reach its destination. This might be inconvenient if you prefer a quick and efficient shower. Lastly, PEX plumbing can result in slower water flow to the shower due to friction loss.

While this may not bother most people, those who enjoy a strong and steady flow of water might find it lacking. Before you decide on PEX plumbing for your tub and shower setup, it’s important to consider these potential effects . While PEX does have its advantages , it’s crucial to weigh them against any possible limitations to ensure the best water flow experience for your needs.

Importance of Direct Flow to the Shower

The key to a truly satisfying shower lies in the seamless flow of water. It guarantees the perfect water pressure, ensuring that every inch of your body is drenched, effortlessly washing away the remnants of soap and shampoo. Imagine the disappointment of weak water pressure or an erratic flow, leaving you feeling incomplete and unsatisfied.

But fear not, for by placing direct flow at the top of your priority list, you can bid farewell to these concerns and indulge in a truly refreshing and invigorating shower every single time. Remember, direct flow is not just about convenience; it’s about creating a moment of pure bliss and immaculate cleanliness. With direct flow, you can leave behind any worries about water pressure and surrender to the sheer pleasure of a fully immersive shower experience.

By the way, if you’re dealing with PVC glue on ABS, you might find this article on how to remove PVC glue from ABS helpful.

Comparison of Plumbing Methods: A Comprehensive Tabelle

Plumbing Method Material Cost Ease of Installation Durability Resistance to Corrosion Water Flow Efficiency Maintenance Requirements Common Installation Issues Compatibility with Tub Spout
PEX Cross-linked polyethylene (PEX) Low Easy Excellent High High Low None Excellent
Brass Tubing Brass Medium Moderate Good Moderate Moderate Medium Some Good
Copper Tubing Copper High Difficult Fair Low Low High Many Fair
PEX-AL-PEX Composite of cross-linked polyethylene with aluminum layer (PEX-AL-PEX) Medium Easy Excellent High High Low None Excellent
CPVC Chlorinated polyvinyl chloride (CPVC) Low Easy Good High High Low None Excellent
Galvanized Steel Galvanized steel High Difficult Good Moderate Moderate High Corrosion, reduced water flow due to rust Good
PE-RT Polyethylene of raised temperature resistance (PE-RT) Medium Easy Excellent High High Low None Excellent

Brass Tubing: A Popular Alternative

A Shining Marvel: The Unparalleled Marvel of Brass Tubing In the realm of plumbing, one choice reigns supreme – the mighty brass tubing. Its magnificence lies not only in its undeniable durability and longevity, but also in its resistance against the corroding clutches of time and the encroaching grasp of scale buildup. Indeed, with brass tubing, your plumbing system shall remain steadfast, unwavering, for years to come.

But the wonders of brass tubing do not cease there. Its versatility knows no bounds, effortlessly integrating itself into various plumbing systems with utmost ease. Whether you embark upon a new venture or seek to enhance an existing setup, fear not, for brass tubing shall be your steadfast companion.

Yet, let us not disregard its aesthetic prowess. Oh, the allure of brass tubing! Its warm, timeless visage bestows upon any bathroom a touch of elegance, captivating the hearts of homeowners and interior designers alike.

It is a favored gem, a treasure to behold. And let it be known, dear reader, that brass tubing is not merely a pretty face – it is a paragon of reliability. Its unyielding resistance against corrosion and scale buildup ensures that the need for repairs and replacements shall be but a distant memory, granting you respite, tranquility, and peace of mind.

Thus, if you seek a plumbing solution that encompasses unwavering durability, imperviousness to scale buildup, and simplicity in installation, look no further than the resplendent domain of brass tubing. Embrace its popularity, for it shall stand the test of time, an enduring choice that shall accompany you on your journey through the ages.

pex to tub spout

Looking to upgrade your tub and shower plumbing from old copper to new PEX? Check out this informative video on how to convert your old copper pipes to a PEX tub spout. Learn the step-by-step process and make the switch today!

YouTube video

Copper Tubing: Pros and Cons

The Marvels and Drawbacks of Copper Tubing: A Prudent Decision In the realm of plumbing, the allure of copper tubing is undeniable. However, before embarking on this path, it is crucial to weigh the merits and demerits. Here is a concise elucidation: Merits: – Copper tubing boasts a remarkable fortitude, ensuring the longevity of your plumbing system, a testament to its enduring nature.

Demerits: – Regrettably, copper tubing can be quite costly when juxtaposed with the more economical PEX pipes. It behooves you to ponder your budgetary constraints before making a final choice. – Over the course of time, copper tubing is susceptible to corrosion, particularly in the presence of certain chemicals and minerals found in water.

This corrosion can inevitably lead to leaks and other plumbing predicaments. Supplementary Aspects to Ponder: – Should you embark on the installation journey, take heed that soldering may be required. In the absence of expertise, it is advisable to seek the guidance of a seasoned professional plumber.

In summation, while copper tubing presents an enticing proposition with its unwavering durability, it does come at a steeper cost and harbors the potential for corrosion. Thus, it is paramount to factor in your unique requirements and financial considerations when choosing between copper tubing and alternative plumbing materials.

If you’re considering using PEX pipe for underground installations, check out our article on “PEX Pipe Underground” to learn about the benefits and best practices for this type of application.

pex to tub spout

Understanding the Plumbing Layout

Embarking on the installation of PEX plumbing for your tub and shower requires a comprehensive grasp of the plumbing layout. This entails mapping out the optimal placement of the tub and shower valves, identifying the water supply lines, and mastering the art of connecting the tub spout. The tub and shower valves serve as the guardians of water flow and temperature, necessitating their convenient positioning on the wall in close proximity to the bathing area.

This allows for effortless adjustments while immersing oneself in a rejuvenating bath. The next step entails a quest to uncover the elusive water supply lines, the conduits through which water is delivered to the tub and shower. These elusive lines lurk behind walls or hide beneath the flooring, their precise location dictating the success of your PEX tubing connection.

Last but not least, acquaint yourself with the holy grail of tub installation – the tub spout connection point. This humble junction is responsible for channeling water into the depths of your bathtub. By securely fastening the PEX tubing to the tub spout using the appropriate fittings and tools, you can ensure a seamless and triumphant installation endeavor.

Mastering the intricacies of the plumbing layout, from the strategic positioning of the tub and shower valves to the identification of the water supply lines and the artful connection of the tub spout, will empower you to conquer the world of PEX plumbing for your tub and shower. May your plumbing endeavors be blessed with success and satisfaction!

How to Easily Install a PEX Tubing to Tub Spout

  1. Understand the plumbing layout of your tub and shower area.
  2. Turn off the main water supply to prevent any water flow during installation.
  3. Remove the old tub spout by unscrewing it counterclockwise.
  4. Measure and cut a piece of PEX tubing to the appropriate length for the replacement tub spout.
  5. Slide a PEX fitting onto one end of the cut PEX tubing and secure it using a crimping tool.
  6. Attach the other end of the PEX tubing to the connection point on the tub spout, ensuring a secure fit.

Steps to Install PEX to Tub Spout

To successfully install PEX to a tub spout, ensure the PEX tubing is securely fastened with clips or straps designed for PEX plumbing. This prevents any unwanted leaks or movement. Next, use a PEX crimp tool to create a tight and reliable connection between the tubing and the tub spout.

Make sure to carefully follow the instructions provided by the manufacturer for proper usage. Once the installation is complete, it’s crucial to test the setup for any potential leaks. Turn on the water supply and carefully inspect the connection points.

Keep an eye out for any abnormal water flow or pressure issues through the tub spout. By diligently following these steps, you can have the peace of mind of a secure and leak-free plumbing system. Take the time to properly secure the tubing, utilize the appropriate tools, and thoroughly test the installation for a satisfactory outcome.

pex to tub spout

Did you know that PEX tubing is actually made from a high-density polyethylene material?


My name is Warren and I am a professional plumber licensed and insured in the State of California. I have been in the business for over 10 years and have undertaken small and large projects including bathroom renovation, toilets, garbage disposals, faucets, sinks and kitchen plumbing jobs. This site is based on my experience with toilets. I have installed the best brands and models in all sizes and shapes. I hope this helps you with the unbiased information that you need to make the right decision. …weiterlesen

1/2 Common Mistakes to Avoid when Installing PEX to Tub Spout

Mistakes can easily occur when installing PEX tubing to a tub spout, but they can be avoided with a few simple steps. The key is to measure and cut the tubing accurately to ensure a flawless fit and prevent any potential leaks. Additionally, it is crucial to use fittings that are specifically designed for PEX tubing, as they will create a secure and reliable connection.

Lastly, proper securing of the tubing using the appropriate tools and techniques is essential to prevent any water damage or leaks. By being mindful of these common mistakes, you can successfully install PEX tubing to your tub spout without encountering any leaks or complications.


In conclusion, understanding the limitations and benefits of PEX plumbing is crucial when considering its use between the tub and shower valve and the spout. While PEX offers many advantages, such as flexibility and resistance to corrosion, it may not be the best choice in this specific scenario due to its potential impact on water flow. It is important to ensure a direct flow to the shower for optimal performance.

Brass tubing and copper tubing are popular alternatives that can provide a more suitable solution. However, if you do choose to install PEX to the tub spout, it is essential to have a clear understanding of the plumbing layout and follow the correct installation steps. By avoiding common mistakes, you can ensure a successful installation.

Overall, this article provides valuable insights for those seeking information on using PEX for tub spout plumbing. For more helpful articles on plumbing and related topics, we recommend exploring our other informative content on our website.

If you’re looking for a reliable tool to remove ferrules, check out our article on the Ferrule Blaster Ferrule Puller for a detailed review and expert tips.


Can you use PEX on tub spout?

The tub spout for your bathroom can be made of different materials like copper, brass, or galvanized pipe. It’s important to note that using PEX pipe is not suitable in this case. This is because the pipe coming out of the valve needs to be strong enough to support the weight of the tub spout and handle the pressure from pulling or pushing down on the diverter built into the spout. So, it’s recommended to choose a durable material like copper, brass, or galvanized pipe for your tub spout.

Can I use PEX for shower spout?

It seems that using 1/2″ PEX to connect a tub/shower valve to the tub spout may not be the best choice. This is because the internal diameter of the PEX and its fitting is too narrow, which can result in a dribbling shower when using the tub spout. This information was gathered on January 20, 2021.

Can you run PEX to a shower valve?

For shower valves, it is recommended to use threaded PEX water line fittings. These fittings should be tightened before crimping the PEX water line. It is important to note that this particular brand of PEX has a plastic bracket that forms the sharpest 90-degree angle allowed. Using these fittings and ensuring proper tightening and crimping will help ensure a secure and efficient shower valve installation.

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