Technical Data
PEX Fittings Product Range

Last Updated

December 11, 2020

Flowflex reserve the right to alter the product ranges and specifications associated with its products without prior notice

Flowflex PEX fittings is our solution for connecting brass fittings to PEX pipe. PEX Fittings, 16mm to 20mm, come manufactured with an insert and are supplied with a split olive to allow for a firm joint. Our PEX range brings quality and reliability to your localised water system and is suitable for use central heating and underfloor heating systems. Our PEX system range includes Brass Fittings, Valves, Manifolds, Pipe and Pipe Sheaths for a full system solution.

  • Manufactured to BS EN 1254-3
  • Marked Flowflex UK on cap nut


  • Domestic
  • Commercial


Flowflex operates a quality management system audited by the British Standards Institute for the manufacture and supply of fittings and components for use in all applications of the HVAC industry.

Tube Compatibility

PEX Pipe Specifications

  • PEX Pipe supplied is eligible to bear the CSA mark.
  • PEX Pipe supplies is eligible to use the SKZ - testing & inspection mark.
  • PEX Pipe supplied is eligible to use the EBETAM (MIRTEC) mark of conformity.
  • The material of the PEX Pipe is WRAS Approved.

Working Conditions

All working conditions assume that the components have been assembled and connected correctly, and adhere to their respective tube compatiblity
When planning to use our products in applications outside the scope of our recommendations, approval from us should be obtained beforehand. Please contact us in these cases.
Intermediate pressure ratings shall be obtained by interpolation

Material Specification