Single Wall

The easy to install single wall flue system

• 80 - 755mm Diameter Range
• Single wall stainless steel flue systems for gas, oil, wood and multi-fuel.
• Residential & commercial applications
• Fluing condensing boilers
• Relining existing chimneys for stoves, boilers or open fires
  Connection between stoves or boilers and chimneys
• Venting warm air gas and oil heaters and for particle/fume extraction system

Specification

Prima Plus

• Advanced corrosion-resistant design and construction using 0.6mm 316L continuously-welded stainless steel. The only stainless steel system to have passed the internationally-recognised GASTEC corrosion test.
• Engineered-tolerance joint simply push-fits together giving exceptional load bearing capacity. Optionally, a locking band can be fitted for extra joint security.
• Inward bead on the male joint spigot acts as a capillary break preventing moisture being drawn through the joint.
• Adjustable 0-90° elbows quickly solve alignment problems on installation of flue runs.
• Can be painted if required.
• For condensing appliances a gasket is fitted to the inward bead of the male joint.

Prima Plus 1mm

• Identical construction and features to Prima Plus but made from 1.0mm 316L stainless steel.
• Use as an alternative to vitreous enamelled flue pipe, painted if required.

Prima SW

• Identical design and construction to Prima Plus but is manufactured from economical 0.5mm and 0.6mm 304BA medium corrosion resistant stainless steel.
• Not for use with condensing appliances.

Application

Prima Plus is a high quality 316L stainless steel single wall flue system with a wall thickness of 0.6mm. It is designed for use on gas and oil burning stoves and boilers with continuous operating temperatures up to 450°C and short firing up to 600°C. With the addition of a gasket to the joint, Prima Plus is designed for fluing condensing gas and oil appliances with positive pressures up to 200Pa, continuous operating temperatures up to 160°C and short firing up to 200°C. It can also be used for lining brick stacks for gas, oil, multi-fuel appliances and open fires as an alternative to flexible liner. (The exception is in England where Building Regulations now disallow the use of 0.6mm as a liner in domestic installations).

Prima Plus 1mm can be used for the same applications as Prima Plus. Additionally it is specifically designed for connecting solid fuel appliances to existing brick stacks or a twin wall chimney. It provides internal fluing of domestic woodburning, coal and multi-fuel stoves and boilers with normal operating temperatures up to 540°C and short firing up to 760°C.

Prima SW is a medium corrosion-resistant 304 BA grade stainless steel single wall flue system designed for use internally on gas and oil-fired (28 sec only) air and ceiling heaters and natural draught boilers with constant operating temperatures up to 250°C.

Corrosion Resistance

Chimneys are subject to significant corrosion attack by flue gas condensates, particularly from solid fuel heavy oils and condensing appliances. Prima Plus and Prima Plus 1mm are specifically designed and manufactured to resist this corrosion. It is the only stainless steel single wall chimney system in the world to have passed the internationally recognised Gastec corrosion test.