Plastic plumbing holds a certain allure for DIY homeowners. It’s readily available at your local hardware store, significantly cheaper than copper piping, and the lack of soldering makes it seem deceptively simple to work with. However, before you rush into a plumbing project armed with plastic pipe and a can of glue, it’s important to understand there’s more to it than meets the eye. Using the wrong type of plastic, improper joining techniques, or unknowingly violating local plumbing codes can land you with a leaky mess and potentially costly repairs far beyond what you initially saved.

Varieties of Plastic Pipe

varieties of pipes

Navigating the world of plastic plumbing can feel a bit overwhelming at first. One of the key players you’ll likely encounter is “Lasco Plumbing“. They are a major supplier of various plastic pipe types and the accompanying fittings. But before you start browsing the aisles, let’s break down the most common varieties you’ll find:

  • PVC: This classic white pipe is strictly for cold water applications. Think drain lines, outdoor irrigation systems, or even non-potable water sources like a pond pump. It’s rigid and requires solvent glue to create a watertight seal between fittings and the pipe itself.
  • CPVC: Similar to PVC in appearance but often has a slightly yellowish tint. This version is rated to handle hot water, making it suitable for indoor supply lines for your sinks, shower, etc. However, it uses the same solvent gluing techniques as its cold-water cousin.
  • PEX: This flexible piping, often brightly colored in red for hot and blue for cold, is gaining wider popularity due to its ease of installation. Unlike the rigid PVC options, PEX can bend, reducing the need for multiple fittings. However, it requires special crimping or expansion tools to properly secure connections.

It’s crucial to note that what type of plastic pipe you’re allowed to use is heavily dictated by local building codes. Some areas may have strict limitations on where plastic can be used within your home. Main water supply lines, for instance, might still require copper in certain localities, while others fully embrace the benefits of modern PEX. Understanding your specific local code restrictions isn’t just about following the rules – it’s about ensuring a plumbing system that will safely and reliably serve your home for years to come.

DIY-Friendly Repairs

DIY Friendly repairs

There are definitely cases where plastic pipe repairs fall well within the realm of competent DIYers. A prime example is addressing backflow problems with one-way valves. Backflow, in the most basic terms, is when contaminated or dirty water gets accidentally siphoned back into the clean water meant for drinking and bathing. This can occur if there’s a sudden pressure change within the water lines – think of it like taking a gulp of water through a straw and then letting go: the liquid wants to flow backward. These “one-way valves”, also known as ‘check valves’, prevent that backward flow, acting as essential safeguards for your home’s water supply.

Installing them in strategic locations as part of your one way valve plumbing system often involves cutting into existing plastic pipe and gluing the valve in place – a task that, if local codes permit, many homeowners can successfully handle.

Another relatively DIY-friendly fix is replacing a leaky fitting in an exposed section of plastic pipe. Perhaps you have a cracked elbow joint in a PVC drain line under your sink, or a PEX connection that wasn’t crimped correctly and is weeping under pressure. With the right tools – a pipe cutter, deburring tool, and the correct glue or crimp rings specific to your piping type – you might be able to solve the problem yourself.

However, it’s essential to emphasize that using the right materials is paramount to DIY plastic plumbing success! Using glue designed for PVC on a CPVC pipe won’t create the necessary bond and will inevitably fail. Similarly, trying to force a barbed fitting onto a PEX pipe without the appropriate expansion tool is a recipe for a frustrating leak. Before embarking on any plumbing repair, taking the time to research the specifics of the pipe materials involved will save you immense headaches down the line.

When the Pros Are Essential

Plastic pipe repair expert

While tackling certain plastic pipe repairs yourself can be satisfying and cost-effective, there are times when calling in a licensed plumber is the only responsible choice. One such scenario is when your home’s plumbing is a mix of metal and plastic piping. Transitioning between these materials requires specialized plastic water pipe fittings to ensure both a watertight seal and to prevent potential galvanic corrosion where the dissimilar metals meet. This isn’t the place to experiment – a pro will know exactly which coupling is needed for your specific situation.

Any major repiping project generally falls into professional territory. This involves more than just the skill of joining the pipes themselves. Plumbers are intimately familiar with building codes governing things like pipe sizing, proper venting for drain lines, and ensuring your whole system is designed to work efficiently. Even experienced DIY enthusiasts would be wise to at least consult with a plumber in the planning stages of a whole-house repipe. This allows you to tap into their expertise and avoid potentially serious pitfalls that might necessitate having work redone to pass a future inspection.

Finally, there’s the “unknown factor” – particularly with older homes. There was a period of time where plastic pipe materials, like polybutylene, were used that turned out to be highly problematic. These outdated plastics often become brittle and prone to catastrophic failure. If your home predates the early 2000s, it’s worth having a skilled plumber assess your existing plumbing system. They can spot those outdated pipes and advise you on whether a preventative repipe is the smartest course of action, even if you don’t have a leak…yet.


The key to success with any DIY plumbing project, particularly those involving plastic pipe, is being honest with yourself about your skill level and knowing the limitations of your local building codes.

Of course, when you’ve decided that a pro is the way to go, finding the right one is important. Look for plumbers who are properly licensed in your state – their licensing board’s website is a great place to verify credentials. Don’t hesitate to ask about their specific experience with plastic piping systems like PEX. Modern plumbing utilizes a wide range of materials, and you want to be sure the professional you hire is as up-to-date on the newest technologies as they are on repairing old-fashioned galvanized pipes.

Remember, this article isn’t meant to scare you away from tackling certain plastic pipe repairs on your own. Rather, it’s about empowering you to make informed decisions. Taking the time to understand the materials involved, the scope of the work, and local regulations will prevent a simple project from turning into a major plumbing disaster. Sometimes the smartest DIY move is knowing when to hand the pipe wrench to a qualified professional.

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