Qual-PEX, Easylay PB & Qual-PEX Pipe-in-Pipe pipes meet the requirements of class S service conditions specified in Tables 1 & 2 of BS 7291 – 1 2001 which covers specifications for both vented and sealed central heating systems. Qual-Pex pipe also meets the requirements of Class S service conditions in Table 1 of ISO EN 15875-1 : 2003 for a service life of 50 years.
Continuously Operated Re-Circulating Systems (Secondary Hot Water Circulation / Ringmain Installations)
A continuously operated re-circulating system is a water-replenished circulating system, which is maintained at a constant high temperature, to provide a continuous source of hot water. Continuously operated re-circulating systems are used to distribute constant hot water to draw off points that may be distant from the source, or hot water storage vessel. Continuously operated re-circulating systems are very different from conventional hot water supply and central heating systems found in domestic properties, for which our products have been tested to, under either BS7291 Class S or WRAS approval standards, and for this reason Pipelife products must not be used on any continuously operated re-circulating systems as they are not approved under the current version of these standards. The exception would be those systems which have been designed for domestic situations with intermittent temperature of less than a maximum of 65°C. This is in accordance with BS7291.
To summarize, a continuously operated re-circulating system is a hot water supply system which provides hot water to outlets, and incorporates all three of the following:
• Is maintained at a temperature above 60°C,
• Is replenished with an incoming water supply, to replace the water drawn to outlets,
• Is a pumped, circulating system.
Qual-Oil pipe is made from PEX materials, which makes it durable and yet flexible and easy to install. No need to oversize your oil line as Qual-Oil is available in 10mm, 22mm & 28mm. Aesthetically pleasing conifer green colour compatible with outdoor environments. Qual-Oil pipe can be stored in the open as it is UV stabilised.
Qual-Gas Yellow MDPE
Pipelife manufactures a complete range of polyethylene water and gas pipe. On the water service side, Pipelife produces service pipe in Medium Density Blue Polyethylene (MDPE) and Low Density Black polyethylene (LDPE). These are manufactured to the highest of international standards which include the British (BS or “Kit” mark), Irish (is), Dutch (KIWA) and Danish (DS) standard marks.
BARRIER PIPE – PB & PEX
Our pipe is available in either coils or 3mtr straight lengths in either PEX or Polybutylene materials depending on the preference of the installer. Our PEX and PB pipe is manufactured, tested & certified to BS7291 class S and DIN16892. The pipe meets the requirements for Class S service conditions as specified in Table 1 of EN12318 for a service life of 50 years. It is also WRAS approved.
Quality Warranty For 25 Years
Twistloc products undergo long-term test programmes and strict quality standards. When correctly installed using Twistloc pipe, we offer a 25 year warranty against the defects in materials and manufacturing across our standard Twistloc Fittings range from the date of delivery.
Twistloc Plumbing & Heating Products are designed for use on normal UK domestic plumbing and heating systems and supplied in accordance with our conditions of sale. The system must be designed, installed and operated within the temperature and pressure ratings as defined in BS7291 Class S while taking into account all other exclusions and limitations as defined in the design, application and installation guidance provided by the manufacturer.
Note: The term ‘Twistloc’ refers to all white fittings which have the Twistloc cap safety mechanism and excludes all valves, black fittings and flexihoses.