PPR vs PEX: Choosing the Right Raktherm Pipe System for Hot and Cold Water Applications

One of the questions we often hear at Build World Dubai from our customers is which of the two pipes, PPR and PEX, they should go for. Can’t blame them, because this whole thing can get really confusing. Both varieties work really well and come with their own set of advantages. Fortunately, or unfortunately, both are widely used in the construction industry, making it extremely difficult to choose between them.

The plumbing system is critical to every project, regardless of whether it comes under the residential or the commercial category. When you choose materials for hot and cold water distribution, you need to make sure they can handle high temperature variations, high water pressure demands, and moreover, strict municipality regulations. Meaning, you need to pick pipes that will last for decades without corroding, leaking, or scaling.

Raktherm is one of the most popular brands in the UAE for high-performance thermoplastic piping. The brand follows German engineering standards in manufacturing. Their two primary pipe systems for portable water distribution include PPR (Polypropylene Random Copolymer and PEX (Cross-linked Polyethylene).

Build World Dubai is one of the most trusted Raktherm suppliers in the region, and we have helped hundreds of clients in making the right choice when it comes to pipes and plumbing systems. This piece explains the key differences and features of Raktherm PEX and Raktherm PPR pipes to give insights that can guide you toward your choice of materials for your project.

What is Raktherm PPR?

Raktherm PPR is a variety of pipe made from Random Copolymer Polypropylene. This particular material is known for its rigidity, long service life, and chemical resistance. PPR pipes are the ones you usually see in exposed or hidden plumbing systems inside buildings for both hot and cold water supply.

Raktherm PPR pipes are characterized by,

• Rigid, straight shape that stays even under high-pressure conditions

• Ability to create monolithic, leak-proof connections due to its welding process (socket welding) that joins the material through heat fusion.

• The ability to handle high temperatures, even up to 95 degrees Celsius, makes them a good option for hot water systems

• Corrosion, scaling, and chemical resistance

• Relatively longer lifespan (under normal operating conditions, they can stay damage-free for well over 50 years)

• Available in three different color codes: green (standard), blue (cold water), and red (hot water)

The heat fusion method, instead of a mechanical connection, makes it practically leak-proof at connection points once the system is properly installed. Actually, this is one of the major reasons why Raktherm pipes are the preferred choice for plumbing installations in residential towers, hotels, commercial buildings, and even hospitals across the Gulf region.

What is Raktherm PEX?

Unlike Raktherm PPR, a PEX pipe is made from cross-linked polyethylene, which is a plastic material that behaves very differently from the former one. PEX is highly flexible; it bends and flexes, making it ideal for applications where routing around obstacles or creating curved paths is required.

Key characteristics of Raktherm PEX include

• Flexibility (can bend around corners and obstacles without fittings)

• No heat fusion is required for the welding process. Joined using compression, crimp, or push-fit fittings

• The temperature handling scale is very large. It can safely deal with temperatures ranging from below freezing up to approximately 95 degree celsius

• The pipe expands rather than cracking. This ensures high resistance to freeze damage

• Considered to be ideal for underfloor heating, radiant cooling, and embedded systems

• Easier installation in tight or complex spaces

Since this pipe variety can be laid in continuous loops without joints buried in the slab, it is a popular choice when it comes to underfloor heating systems. With fewer joints, you can ensure fewer potential leaks, while the flexibility feature makes sure that the pipe follows the floor layout naturally.

Comparison Table: PPR vs. PEX

Frequently Asked Questions

Is Raktherm PEX safe for drinking water?
It totally is. These pipes are manufactured to meet international health as well as safety standards. They are approved by authoritative bodies for potable water applications.

Do I need a special welding machine for the installation of Raktherm PPR?
Yes, you do. These pipes are joined using a heat fusion welding machine. Build World Dubai supplies the proper welding equipment along with the pipes and fittings. You can use this to ensure that the pipe is installed properly and everything is in place, working properly, as it should.

Can I use Raktherm PPR for underfloor heating systems?
No, you cannot. These types of pipes are rigid, while the underfloor heating systems demand a material that makes continuous looping possible. The alternative, Raktherm PEX, is the right choice for this application.

When should you go for Raktherm PPR?

It is considered the standard for most plumbing installations indoors. Whether you are working on a residential building, apartment complex, commercial tower, or hospital, you can choose PPR as the primary material for the main water distribution network.

Checklist for when to choose PPR

• If you need a rigid, fixed piping layout with neat, straight runs

• If you want the pipes to be concealed in walls, chases, or ceiling voids

• If you want the system to carry both hot and cold water at high pressure

• If the project requires long-term, low-maintenance infrastructure

• If you want leak-proof, fused joints that don’t rely on mechanical connections

• You are working on a hotel, hospital, school, or commercial buildings

As any Raktherm supplier in the UAE should, we stock the full Raktherm PPR range, from pipes and fittings to elbows, tees, and reducers.

When to choose Raktherm PEX?

Raktherm PEX pipes are for projects where flexibility is the priority. Now that underfloor heating and radiant cooling systems are growing as a trend in the UAE, Raktherm PEX pipes are also in high demand since they are the standard material for those applications.

Go for Raktherm PEX if,

• You are installing an underfloor heating or radiant cooling system

• The project involves embedded pipes in screeds or slabs

• The pipes need to navigate tight bends without multiple settings

• The system is exposed to potential freeze-thaw cycles (although this does not happen often, it is still relevant in cold storage facilities)

• The system needs faster installation in a complex or retrofit environment

• You are working in a villa, townhouse, or residential development with underfloor systems

The above-mentioned scenarios require Raktherm PEX pipes to function properly. As a reliable Raktherm supplier in the UAE, we can guide you on the right dimensions and other aspects to choose the pipe that works perfectly for you.