The standard barbed fitting is used for connecting 16mm LDPE pipe together. The Fittings are made in the EU using UV stabilised plastic. The sharp barbs make sure that the Joint is reliable and once fitted they are rated to 6 bar unlike normal domestic barbed fittings that are rated to pressures between 2.1 and 2.8 bar. The reason for this superior performance is the and number of barbs and their shape. Once fitted they are almost impossible to remove and if a mistake is made in many cases they have to be cut off. This is because of the size and sharpness of the barb and this can only be made with precise tooling and technical expertise found in European factories. Using Barbed Fittings

If you are not sure which type of plastic tubing you need then you are welcome to get in touch to request samples which we will post to you using Royal Mail. Plastic tubing shapes There is an important but often misunderstood difference between tube and pipe, which we explain in our blog. The main difference is how the profiles are manufactured and measured. The difference between Pert-Al- Pert pipe and EVOH Pert pipe and is that PAP can be used in underfloor heating and potable water applications, and is form-stable. We offer some sizes in a flexible PVC. Flexible PVC tubing is suitable for internal rather than external applications. Rigid or flexible PVC tubes? Plastic pipe and plastic tube are both hollow cylinders, but they are not identical. Basically, pipe uses the inside measurement and tube uses the outside measurement. How do we measure our plastic tubing?A good way to explain the difference between rigid PVC and flexible PVC is that rigid PVC tubing is more like a ruler whereas flexible PVC tubing is coiled and can be put around your waist like a belt. Barbed fittings can be pushed straight in to 16 mm outside diameter LDPE pipe. This is however a lot of pushing and can be made much easier by heating the pipe prior to installation. If you are fitting a few fittings then leaving the pipe in a warm place over night or in the sun during the day will ease installation however if you are fitting a lot of them then you should heat the end of the pipe in some very hot water or heat it using a Blow torch. If you are using a blow torch then position the pipe in the flame so that the heat is evenly spread round the pipe. Hold it in the flame for 2 seconds and then remove it from the flame. Now insert the barbed fitting in to the pipe. High temperature resistance- a maximum sustained working temp up to 70°c & maximum transient temperature up to 85°c

Our range of premium 16mm pert-al-pert pipe is manufactured to ISO9001 European standards ensuring outstanding performance & reliability in all types of warm water underfloor heating systems. WRAS Approved– This pipe has been tested and certified with full UNITED KINGDOM ‘WRAS’ approval – a rigorous testing procedure which certificates only the highest quality products as fit for use in UK domestic water applications. Very low expansion and contraction, just 5cm in 100 linear metres which is similar to copper (Ordinary plastic pipe has an expansion/contraction rate of approximately 50cm in 100 linear metres) Wunda's thermally dynamic 16mm PEXb-AL-HDPE pipe has an aluminium core that produces a higher heat output than ordinary Pex and Polybutylene pipe and is easy to use. We offer 16mm multiplayer pipe in a range of lengths to suit your needs, and in a Premium Pex-Al-Pex option for maximum efficiency.The 5 layer 16mm pert-al-pert pipe is used in all of our warm water underfloor heating kits and offers unrivalled suitability for underfloor heating by combining the best elements of a plastic and metal pipe into one product. The WRAS approval determines that this product can be used in all UK domestic plumbing applications including drinking water installations – as well as central heating and underfloor heating applications. PEXb-AL-HDPE pipe is stiffer than a PEXb-AL-HDPE pipe and is not suitable for use in Overfloor heating systems that require tight bends and close pipe spacing.