What is PPR?

PPR means polypropylene random copolymer, a thermoplastic consisting of chains of carbon and hydrogen. The“R” refers to the random blend of long and short hydrocarbon chains that provide both rigidity and flexibility, resulting in a material with strong structural properties that can absorb impact and deflection.

Polypropylene random copolymer (PPR) pipes and fittings are used for plumbing inmechanical and industrial applications around the world. Pipes made from PPR are lightweight, non-corrosive, non-rusting and non-scaling. They are permanently leak-free by hot-fusion connections and leak-free joints.

What is SDR?

Standard dimension ratio (SDR) is a method of rating a pipe's durability against pressure. The standard dimension ratio describes the correlation between the pipe dimension and the thickness of the pipe wall.

What is the thermal expansion coefficient of RIIFO PPR Pipe?

The thermal expansion for RIIFO PPR Pipe is approximately 0.16(mm/mK).

What sizes of RIIFO PPR Pipe are available?

Available with nominal outer diameters of 20, 25, 32, 40, 50, 63, 75, 90, 110, 160.

Does RIIFO PPR pipe affect the quality of drinking water?

Approved by NSF/KTW certification test,RIIFO PPR pipe isnon-toxic, odorless,harmless,andnot easy to breed bacteria.

What is the purpose of the color stripes on the pipe?

The color stripes are used to distinguish the working conditions of pipelines. Red represents hot water pipelines, and blue represents cold water pipelines.

What connection method does RIIFO PPR Pipe use and what are the requirements?

According to the material properties of polypropylene random copolymer and the method of connection by out - fusion welding, RIIFO PPR Pipe uses heating to make the PPR joint reach the melting point and melt, and then uses the socket method to fuse the pipe and the pipe fittings together.

What is RIIFO Multilayer Pipe?

RIIFO Multilayer Pipe, also called PAP, the high-quality RIIFO Multilayer Pipe for drinking water and heating installations consist of inside and outside layers of cross-linked polyethylene and a core of aluminium. All layers are permanently bounded together by means of intermediate adhesive layers to form a single product. A special welding technique guarantees a maximum of safety.

RIIFO Multilayer Pipe unites the advantages of plastic and metal pipes. The inner and outer layers of cross-linked polyethylene provide flexibility and lightness. The smoothness of the inner cross-linked polyethylene layer reduces flow noise transmission and prevents corrosion. The longitudinally overlapped welded aluminium layer ensures the dimensional stability of the pipe and prevents oxygen penetration. The aluminium layer is also crucial for the strength and the thermal expansion of the pipe. With the permanent bond between the cross-linked polyethylene layers and the aluminium layer, the linear expansion of the pipe is determined by the expansion factor of the aluminium which roughly corresponds to that of a metal pipe. RIIFO Multilayer Pipe offers a high degree of flexibility and durability, combining with high pressure and temperature resistance.

Is the installation of RIIFO Multilayer Pipe easy? Does it require special tools

RIIFO Multilayer Pipe can be used in a variety of connections and is very easy to install, but we still recommend asking operators with professional skills to install.

Can RIIFO Multilayer Pipe be used as a underfloor heating pipe?

Yes. RIIFO Multilayer Pipe is suitable for such an application.

Can I use air to pressure test RIIFO Multilayer Pipe?

Yes. However, pressure testing with high pressure air can be dangerous if not operate properly. And any tests with air must only be done by a competent-trained engineer who has to be confirmed with the RIIFO technical team before testing.

What is the thermal expansion coefficient of RIIFO Multilayer Pipe?

The thermal expansion for RIIFO PPR Pipe is approximately 0.025(mm/mK).

Can RIIFO Multilayer Pipe permeate oxygen and light?

The aluminum layer has an excellent oxygen barrier (Oxygen Permeability <0.01mg/m2.day) and opacity.

What is the minimum bending radius of RIIFO Multilayer Pipe?

As pipes with a nominal diameter (De) are not greater than 32mm, the bending radius of the direct bend, centered on the pipe axis, should not be less than 5 times the size of the pipe.

What is PEX?

PEX means cross-linked polyethylene, is a form of polyethylene with cross-links. It is used predominantly in building services pipework systems, as well as hydronic radiant heating and cooling systems. PEX is an alternative to polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC) or copper tubing for using as residential water pipes.

What is the difference between red and blue PEX pipes?

Their performance is exactly the same, and the color can be used to distinguish hot and cold water lines.

Is the PEX tube freeze resistant?

Yes, the PEX tube is freeze-damage resistant. The PEX pipe can expand to a certain extent when it is frozen, and shrink to its original shape when it is thawed. However, PEX pipes are not freeze-proof, and you should use standard insulation precautions to prevent freezing.

What are the differences between PEX-A,PEX-B and PEX-C?

They all meet the same performance standard, but their manufacturing processes are completely different.

PEX A. Peroxide method-It involves introducing peroxide (a form of oxygen) into HDPE before forming HDPE to achieve the highest degree of cross-linking.

PEX B. Silane method-It is the most common manufacturing method.

PEX C. Irradiation method- It is not as widely applied as the first two methods.

Can the RIIFO PEX pipe be buried directly?

RIIFO PEX pipes are allowed to be buried directly in soil or concrete. For safer and faster installation, we recommend using pre-sleeved PEX pipes

What are the benefits of using a under-floor heating system?

Comfort: The entire floor is heated, so the warmth is released evenly. That means the situation of extremely hot or cold will not occur.

Low operating cost: Compared with a radiator heating system, RIIFO Underfloor Heating System can cover more area in a room. If installed correctly, the underfloor heating system can help you save energy and save monthly bills.

Design freedom: UFH systems are invisible because they are hidden under the floor, making them ideal for open living.

Does my floor heating system need a manifold?

The heating manifold provides independent flow and return circuits for each radiator, making it easier to control the energy demand of each radiator, so it can provide uniform and comfortable warmth across the floor

How long does it take for floor heating to heat up?

For those installed on well-insulated wooden floors, the systems will warm up within an hour. If you use them on a thick and non-insulated concrete floor, it may take up to 3 hours to heat up. 

What should I do if I find that the underfloor heating system doesn’t work?

If your floor heating system is not warming up, then you should check a few simple things.

-Check if the flow meter and return valve are turned on.

-Check whether the temperature control valve (if installed) is operating normally. If the actuator valve is turned on and the pump and boiler are working, please check the flow and return ball valves on the manifold (multi-zone manifold).

-Air may be trapped in the pipe and stay there, cau

Will installing floor heating affect my floor height?

Yes. Installing a floor heating system will increase the floor height, because the floor heating pipe needs to be installed on the floor heating board, and certain floor heating insulation measures should be taken.

What is PVC?

PVC, also known as polyvinyl chloride, is a polymer formed by the polymerization of vinyl chloride monomer (VCM) in the presence of peroxides, azo compounds and other initiators or under the action of light and heat according to the free radical polymerization reaction mechanism. Vinyl chloride homopolymer and vinyl chloride copolymer are collectively referred to as vinyl chloride resin.

Can PVC drainage pipe be used to transport high-pressure gas?

No. PVC drainage pipe is not suitable for conveying high-pressure gas, and you can choose other pipes from RIIFO

Do PVC pipes contain plasticizers?

RIIFO PVC pipe meets to the rigid standard and plasticizers are not allowered to be added to its production.

Does RIIFO PVC pipe have a property of flame retardant?

The flame resistance of a material is measured with Limiting Oxygen Index (LOI), which is the percentage of oxygen required to maintain the flame in the surrounding atmosphere.

It is generally believed that LOI<22% are flammable materials, LOI 22%-27% are combustible materials, and LOI>27% are flame-retardant materials. The LOI of rigid PVC pipe is around 45, which is a flame-retardant material.

Is RIIFO PVC pipe be recycled?

PVC is very suitable for recycling. In addition, due to its thermoplasticity, PVC can be recycled multiple times without significant performance degradation.

What are the recommended traps?

The most common traps are P or S traps under the sink, or traps under the toilet.

What kind of gas can be transported by the RIIFO multilayer gas piping system?

Both natural gas and liquefied petroleum gas can be transported by RIIFO gas pipes.

Can I use water pipe fittings to connect to the gas system?

No. Water pipe fittings use Ethylene propylene diene monomer rubber (EPDM) sealing ring, and gas pipe fittings use Nitrile rubber (NBR) sealing ring. Mixed usage may cause leakage risk.

Can RIIFO multilayer gas pipe be used in combination with the fittings from othe

RIIFO does not recommend the use of multi-layer gas pipes in combination with pipe fittings from other manufacturers because they have not been verified by the system.

Is RIIFO multilayer composite pipe easy to install? Can anyone install it?

NO. Gas pipelines need to be installed and tested by certified professionals.

How do I conceal my gas system?

First, you need to confirm that your local regulations allow concealed installation of gas pipelines.

Concealed multilayer composite pipe should comply with the following provisions.

(a) Concealed part should not have joints

(b) Pipes must be covered after passing the airtightness test, and the thickness of the cover layer should not be less than 10mm.

(c) The concealed part should have obvious signs indicating the location of the pipeline, or other safety protection measures.

The nominal outer diameter of the concealed pipe should not be greater than 25mm, and the height of the concealed horizontal pipe buried in the wall from the ground should be taken below 0.45m or above 1.8m.

When the pipe crosses the concrete roof, ground, wall and other parts, it should be pre-drilled or pre-buried casing according to the design requirements with the civil construction, and the inner diameter of the hole or casing should be 30mm~40mm larger than the outer diameter of the pipe.

Can RIIFO conduit and fittings be encased in concrete?


Which standards apply to your electrical conduit and fittings.

IEC 61386-21.

What is the insulation capability of RIIFO conduits and fittings?

Able to resist AC2000V voltage and insulation resistance more than 100MΩ.

Can RIIFO tubes and fittings be bent?

RIIFO pipes and fittings can be bent in a low temperature environment (-5) with special tools.

What is the chemical resistance of RIIFO pipes and joints, do you have data or s

PVC has good chemical stability and can withstand a variety of alcohols, fats, oils and gasoline without aromatic hydrocarbons. It can also resist most common corrosive agents, including inorganic acids, alkalis and salts (resistant to concentrated hydrochloric acid, 90% sulfuric acid, 60% nitric acid and 20% sodium hydroxide, etc.). However, PVC should not be used with esters, ketones, ethers, aromatic hydrocarbons or chlorinated hydrocarbons. In addition, dimethylformamide, pyridine and tetrahydrofuran will also have a greater impact on PVC. PVC will absorb these substances, which will lead to swelling and reducing tensile strength.

Can RIIFO pipes and fittings be installed outdoors directly?

No. RIIFO PVC pipes and fittings are not suitable for applications exposed to direct sunlight. The surface of the pipe will lose its luster and develop into chalking.

Exposure of PVC to the ultraviolet components of the sun will cause the PVC molecules on the exposed surface to permanently transform into a complex structure represented by polyene formation. It can cause discoloration of the catheter, which is commonly known as "ultraviolet discoloration" and "ultraviolet degradation".