SIT has developed a new product line to manage the exhaust of condensing
boilers in cascade, up to 7 modules of 50 kW.

The system is manufactured in polypropylene plastic materials (UV-proof and Fire proof), suitable for this application, and it fulfils the standard rules such as the EN 483, EN 14471.
The basic elements, such as extensions and elbows, have the following diameters: 110 mm, 125mm, 160 mm and 200mm. Collectors (pipes with side inlet for each boiler of the cascade) as well have the same diameters as the basic elements, with both 80mm and 110mm side inlet.
Fittings, adapters, plugs and condensate drains are also included in the range.
An integral part of the system is the safety valve (clapé): this item prevent the fumes inside the cascade flue system from coming back into one of the boilers of the cascade. The following solutions are available: 60/80, 80/80, 80/110, 100/110, 110/110mm.