De Marinis ISO 25 PLUS P2C3 30° twin-wall elbow G50

The De Marinis P2C3 30° elbow is an ISO 25 PLUS G50 component designed to create 30° offsets and directional changes in insulated twin-wall flue systems.

Its 30° angle provides a significant but still progressive change in direction, making it suitable for routing the chimney around structural obstacles or shifting the flue axis.

The P2C3 is manufactured with an AISI 316L BA stainless-steel inner wall, an AISI 304 BA stainless-steel outer wall and 25 mm blown mineral wool insulation.

It is available in nominal internal diameters Ø80, 100, 130, 150, 180, 200, 250, 300 and 350 mm.

Main features

• Manufacturer: De Marinis
• Range: ISO 25 PLUS G50
• Product family: P2C3
• Type: insulated twin-wall elbow
• Angle: 30°
• Function: offsets and directional changes
• Inner wall: AISI 316L BA stainless steel – EN 1.4404
• Outer wall: AISI 304 BA stainless steel – EN 1.4301
• Insulation: 25 mm blown mineral wool
• Installation: indoor or outdoor
• Available internal diameters: Ø80 to Ø350 mm

What the P2C3 is used for

The P2C3 is used where the flue route requires a 30° directional change or offset.

Typical applications include:

• creating chimney offsets;
• routing around structural elements;
• correcting the flue route;
• adapting the chimney to the building layout;
• combining two elbows with an optional straight section to shift the flue axis.

Creating an offset

Two P2C3 elbows can be combined, optionally with a straight section between them, to create a parallel flue offset.

The actual displacement depends on flue diameter, distance between elbows and the length of any intermediate straight section.

Design note: offset geometry should be checked against the De Marinis technical drawing and the installation requirements for the complete flue system.

P2C3 and other ISO 25 PLUS elbows

• P2C05: 5° elbow
• P2C15: 15° elbow
• P2C3: 30° elbow
• P2C4: 45° elbow
• P2C9: 90° elbow

ISO 25 PLUS and G50 classification

The P2C3 belongs to the De Marinis ISO 25 PLUS insulated twin-wall flue system.

The high-temperature designation is:

T600-N1-W-V2-L50040/050/060-G50

The G50 classification corresponds to a 50 mm clearance from combustible materials in the certified De Marinis configuration.

Important: G50 applies only to the certified ISO 25 PLUS configuration installed according to De Marinis instructions.

P2C3 dimensions and De Marinis product codes

How to read the technical drawing

• Øi: nominal internal flue diameter;
• Øe: external diameter of the insulated twin-wall system;
• A: main elbow overall dimension;
• B: transverse dimension generated by the elbow geometry;
• 30°: deviation angle from the flue axis.

Installation

The P2C3 must be installed according to the correct system orientation and flue layout.

Where two elbows are used to create an offset, joint alignment, spacing and support of intermediate sections must be checked carefully.

Connected sections must be adequately supported to prevent excessive mechanical loads from being transferred to the elbow.

Installation must be carried out by qualified personnel in accordance with De Marinis technical documentation, appliance instructions and applicable regulations.