Top 5 mistakes when installing plastic pipes and how to avoid them

Installing plastic pipes seems like a simple task: they are lightweight, easy to cut, and can be connected with glue or compression fittings. However, as practice shows, most beginners make typical mistakes that quickly lead to system failure.

These mistakes lead to leaks, cracks, clogs, and unexpected expenses. Whether you are about to embark on a DIY project or are in the process of renovating your home, you need to be informed so you can ask yourself or others questions about the products to be used.

In this article, we will take a detailed look at the most common problems when using plastic pipes in common renovation projects like bathroom updates and kitchen makeovers. We will give you advice on how to avoid them so that repairs go smoothly and last a long time.

Mistake 1: Incorrect selection of pipe and fitting diameters

One of the most common problems is trying to “fit” the pipe to existing elements, ignoring exact dimensions and standards. When the pipe diameter does not match the fitting or other system element, the connections become unreliable. The first time water is turned on or there is a pressure drop, leaks may occur, requiring disassembly and reassembly.

To avoid this, always check the diameter and class of the pipe, as well as the compatibility of the fittings, especially if the system contains different types of elements.

Visit the pireys.com online store to choose high-quality plumbing PVC pipes and accessories with good delivery terms. The team also offers advice and very competitive prices – you will definitely not make a mistake in your choice and will not overpay.

Mistake 2: Insufficient pipe preparation before installation

Some people believe that pipes can be joined immediately with glue or compression. Remember to prepare the pipes properly. Wipe off any dust or dirt, especially if the joints have been touched by hand.

Otherwise, the adhesive will not be able to bond the two pipes or the pipe and fit securely. This is a very quick way to cause depressurization, as such a system will leak water at the joints. This mistake is often made in older apartments.

Mistake 3: Incorrect pipeline route planning

Many people start installing the system “by eye,” without drawings or plans. As a result, the route turns out to be confusing, with unnecessary bends and sharp transitions. T

his not only complicates installation, but also increases the risk of clogging and reduces the throughput of the system. Before starting work, it is worth drawing a diagram of the pipe layout, taking into account the slopes for drains and leaving enough space for maintenance.

Mistake 4: Ignoring thermal expansion

Don't forget that PVC can react to temperature by contracting or expanding. For you, this means that you need to allow for thermal deformation. Otherwise, the pipe may disconnect, crack, and create a leak. Planning for thermal expansion can help you avoid many unpleasant surprises in the future.

Mistake 5: Saving on materials

Many people try to save money by buying cheap pipes and fittings. This often results in components that cannot withstand pressure or break quickly, and the system needs to be repaired after only a few months.

To avoid this, it is worth choosing certified pipes and fittings from trusted manufacturers, even if their price is slightly higher. This is an investment in durability and peace of mind in the future.

Also, consider buying not in a mass market, but in specialized stores that supply pipes and accessories. You are sure to find a wider range, more flexible delivery terms, and the opportunity to consult with practicing craftsmen.

If you decide to do everything yourself, don't spare any expense on consultation – it will help you avoid much higher costs in the future.

Let's summarize the main mistakes and rules of installation

Here is a single list that will help you avoid problems when installing plastic pipes, if you decide to install the system yourself or want to check the quality of the work of hired craftsmen.

Typical mistakes and rules for avoiding them:

• Incorrect selection of pipe and fitting diameters – always check compatibility;

• Insufficient preparation of the pipe before installation – cleaning and degreasing are critically important;

• Lack of pipeline route planning – draw a diagram and take slopes into account;

• Ignoring the thermal expansion of pipes – leave a margin for deformation;

• Saving on materials – choose certified pipes and fittings from reliable manufacturers.

• Following these rules helps to make installation quick, reliable, and durable, as well as avoid unnecessary repair costs in the future.

Installing plastic pipes is only simple at first glance. Paying attention to details, selecting the right materials, preparing pipes, and planning the system will ensure long-lasting and reliable plumbing.

If you avoid common mistakes and follow basic rules, repairs will be stress-free, and the system will serve you for many years without leaks or problems.

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Jenny Kakoudakis is a seasoned interiors blogger. She launched the award-winning Seasons in Colour in 2015 and the luxury property and interior decor blog www.alltheprettyhomes.com in 2024 to cover all your interior design, travel and lifestyle inspiration needs.