Underfloor Heating Pipe

We offer three different types of pipe for use in our underfloor heating systems:
 
Grey Plumbing and Heating Pipe
BS 7291 Class S. Manufactured from polybutylene and to the highest possible standard, this pipe is suitable for use in both underfloor heating and radiator central heating systems.

The pipe also incorporates an oxygen diffusion barrier so as to prevent the ingress of any oxygen into the system. An added cost saving advantage of using this particular pipe is that any remaining coil lengths or off cuts can also be used for the installation of the domestic hot and cold (potable) water services.
 

Ultra-Flexible Underfloor Heating Pipe
BS EN15876. Designed for use in underfloor heating systems only, this ultra-flexible polybutylene barrier pipe lends itself perfectly to systems where ease of handling is essential, such as in solid floor pipe staple systems or fit from below installations.
 

Metal Composite Pipe (MCP)
BS EN21003. For those who prefer a more formable characteristic to lying pipe, we have introduced our 16mm MCP pipe range. Manufactured from raised temperature polyethylene (PE-RT) and incorporating an aluminium inner barrier layer this pipe is designed for use in underfloor heating systems only. This pipe has a practical application in rail and staple solid floor type installation.

Product Documentation
Underfloor Heating Pipe installation guidance
  • Step 1: Cutting the Polyplumb pipe

    Check the pipe is not scored or scratched in any way and if it is, cut back to a point where there is no damage. Using a Polypipe pipe cutter, cut the pipe squarely using the “K” marks on the pipe as a guide. These marks indicate when the pipe has been inserted into the fitting correctly. Step 1b: Cutting copper pipe for insertion in a PolyPlumb fitting Wherever possible, use a rotational pipe cutter when cutting copper pipe. Ensure that all cut ends have a rounded lead in, with burrs removed. Never use a hacksaw. You will need to mark the insertion depth on the pipe as below.

  • Step 2: Use of pipe stiffener

    Insert a pipe stiffener into the pipe (not required on copper pipe). Pipe stiffeners are an integral part of the joint when using Polypipe grey pipe with either PolyPlumb fittings or compression fittings and need to be fully inserted into the pipe end. Polypipe offer two types of pipe stiffener to be used with PolyPlumb fittings - metal and plastic. When using a pipe stiffener, ensure it is fully inserted before applying the fitting.

  • Step 3: Visually check fitting and fitting components

    Visually check that all components are present, undamaged and free from contamination. Lubricants All Polypipe fittings are supplied with pre-lubricated EPDM ‘O’ rings. If any further lubrication is required only Polypipe silicone lubricant should be used. Substances such as solder flux must not be used.

  • Step 4: Insert pipe fully into fitting

    Insert pipe into the fitting, ensuring it is inserted to the full socket depth denoted by the next “K” mark on the pipe.

  • Step 5: Check joint security

    A quick tug on the pipe will confirm that the pipe is inserted past the grab ring and that a grab ring was present in the fitting. It does not however ensure that the pipe is fully inserted as this can only be confirmed by using the depth insertion mark.

    IMPORTANT NOTE: Do not re-joint
    On no account should a pipe be removed from a jointed PolyPlumb fitting by dismantling. If the same fitting is then re-jointed, there is real risk that the outer edge of the grab ring will have become damaged and this will reduce the pull-out performance of the joint when subjected to pressure. The joint will almost certainly fail prematurely and potentially cause serious injury.

  • Step 6: Removing a jointed PolyPlumb fitting

    On no account should a pipe be removed from a jointed PolyPlumb fitting by dismantling. If the same fitting is then re-jointed, there is real risk that the outer edge of the grab ring will have become damaged and this will reduce the pull-out performance of the joint when subjected to pressure. The joint will almost certainly fail prematurely and potentially cause serious injury.

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