Cascade System

Smoke exhaust system for gas boilers installed in cascade

The cascade system developed by Poujoulat is a technical solution for the smoke exhaust of gas boilers (B22P/B23P) installed in line or back-to-back. This range is adapted for the boiler connection and for building a header.

This system has been developed to optimize the appliances ‘efficiency with significant fuel saving and complies with the new building regulations.

When using the anti-back draught valve at the boiler’s outlet, the diameter of the installation can be reduced.

It is available in 5 diameters (Ø130, Ø150, Ø180, Ø200 & Ø250).


CE              Ceric Label

Product details

>Thanks to its small volume, it easily integrates into all configurations

>Cascade system is compatible with condensing gas boiler equipped with anti-back draught valves type: B22P/B23P

> Delivered in kits pre equipped with seals

> Full range of accessories. Lengths with inspection door available.

>Easy fixing locking band with safety ring on all elements.


All of the products offered by Cheminées Poujoulat have been rigorously tested in every configuration by the CERIC Laboratory to ensure they meet highest standards.

Poujoulat-produit Poujoulat-produit-mobile

Technical data

> Max. Temperature limitation: 250°C
> CE marking: 0071-CPR-0014

Ø80 to Ø150 T250 N1 W V2 L50 040 O50 T200 P1 W V2 L50 040 O50 (with joint seals)
Ø180 to Ø350 T250 N1 W V2 L50 060 O50 T200 P1 W V2 L50 060 O60 (with joint seals)

Reducing Tees
The tee branch to branch centres are adjustable
from 480 mm to 580 mm
The centres can be further extended with the addition of another length(s).


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