Specifying Heat Free Installations

Research has shown there are many reasons which can influence an installer’s preferred method of installation. These range from education and tradition to time and cost saving. Yet what is now clear is that most modern systems are utilising either push, press or a combination of both fitting methods.

Restrictions in the use of naked flames on site and difficulties in acquiring hot works permits for public building projects in particular has resulted in heat free jointing methods being the preferred system of choice.

Press technology

Press-fit has a reputation for being a high performing solution. Since its inception in the late 1950’s its popularity has been paramount to the success of many projects. Because there is no need to use heat and solder its is a very clean and fast jointing method. It does not leave behind carbon deposits or flux so there is less risk of corrosion and time required to flush the system.

Push technology

On the other hand push-fit is relatively new in comparison – introduced back in the 1980’s it was originally classified as a light domestic solution used in conjunction with plastic piping. The technological improvements of push-fit fittings means they are now compatible with a variety of pipe materials and their range can easily dovetail with a wide choice from plastic to flexible metal, copper and even carbon steel.

Push-fit offers similar advantages to that of press-fit. As there is no heat required to seal the joint there is no need for a hot works permit which significantly reduces costs associated such as administration and insurance premiums. Labour time saving is another distinct advantage, the process is faster and there is no longer a requirement to stay on site for up to two hours following the use of heat as a precautionary measure to guard against fire.

Another reason as to why these two alternative methods of jointing have been preferred choice is the issue of working in confined spaces. It can be almost impossible to ensure that a joint is made correctly, when using traditional techniques, if access to it is restricted. If the blowtorch, for example, cannot be passed around the fitting completely there is a risk that jointing is incomplete and a corresponding risk of leakage.

Benefits of heat free jointing

  • Major savings in installation time and cost compared with traditional jointing methods
  • A completely heat-free jointing system that requires no shot works permits or extra and costly insurance
  • Clean and rapid; no complicated clamping techniques or long preparation procedures or waiting for adhesive to dry
  • Safety: no naked flames
  • Perfectly clean internal bore – less finishing or cleaning required
  • No localised annealing from high- temperature working
  • No carbon deposits, internal solder runs or flux residue – less risk of corrosion
  • System does not need to be ‘dry’ for effective jointing
  • Ideal for diverse applications such as domestic maintenance and refurbishment, new build and large-scale public sector projects.


Model engineering BIM compliant products

Our range of connection solutions offer innovatively designed, efficient and reliable products and systems that reduce installation time and cost without compromising quality, aesthetics or reliability.

Our VSH Tectite, VSH XPress product ranges are designed to perform faultlessly in a variety of applications and environments – so you can always be sure to connect with confidence whatever your challenge.


  • Demountable and non-demountable options
  • Available in sizes 10mm to 54mm
  • Manufactured from a variety of materials including; copper, stainless or galvanised steel, gunmetal, A-metal or DZR brass
  • Can be used with Tectite flexible metal tube, copper tube, PB and PEX pipe (with liners), chrome plated copper tube or stainless and galvanised steel
  • Provides enhanced performance
  • Provides electrical continuity
  • Suitable for use on hot and cold water services, heating applications and low temperature hot water services
  • Patented TectSEAL
  • WRAS approved


  • Manufactured from a variety of materials including; copper alloy, stainless or carbon steel
  • Extensive range ideal for a variety of applications including; hot and cold water services, closed circuit heating, hygiene environments, internal and external above-ground 2nd and 3rd family gas services and solar
  • Available in sizes 12mm to 108mm
  • Leak Before Press
  • Provides electrical continuity
  • Wide range of approvals
  • GL approved (previously British Gas) see VSH XPress Gas section
  • Chromium plated range
  • Temperature rating from -24°C to 200°C
  • Pressure rating 16bar throughout the temperature range.

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